@article {20_TAP_EDUARDO_PABLO_BOWTIE_UNITARIO,
	title = {Bow-Tie-Shaped Radiating Element for Single and Dual Circular Polarization},
	journal = {IEEE Transactions on Antennas and Propagation},
	volume = {68},
	number = {2},
	year = {2020},
	month = {Feb},
	pages = {754-764},
	keywords = {Antennas, Aperture antennas, bow-tie rotator, orthogonal polarizations},
	issn = {1558-2221},
	doi = {10.1109/TAP.2019.2943357},
	author = {E Garcia-Marin and J L Masa-Campos and P Sanchez-Olivares and J A Ruiz-Cruz}
}
@article {20_EDUARDO_MONOPULSE_DIFUSSION,
	title = {Diffusion-bonded W-band monopulse array antenna for space debris radar},
	journal = {AEU - International Journal of Electronics and Communications},
	volume = {116},
	year = {2020},
	pages = {153061},
	abstract = {In this letter, the design and fabrication of a W-band high-gain monopulse array antenna are presented. The antenna is conceived as a proof of concept for a space debris detection project to develop an on-board radar for a satellite system. The antenna array consists of 16 by 16 circularly polarized radiating cavities fed by a corporate waveguide network with an amplitude taper. An underlying monopulse beamforming network is implemented in waveguide technology as well, providing monopulse capability in both main radiating planes. By means of diffusion bonding, the antenna has been fabricated in a single piece, despite its intricate, multilayer topology. Moreover, the experimental performance shows high agreement with simulations, which is remarkable due to the high sensitivity to manufacturing tolerances at this frequency. Over a 10\% bandwidth is experimentally achieved for efficiency over a 75\%, axial ratio under 3~dB and impedance matching under -10~dB.},
	keywords = {millimeter wave technology, Planar arrays, radar antennas},
	issn = {1434-8411},
	doi = {https://doi.org/10.1016/j.aeue.2019.153061},
	url = {http://www.sciencedirect.com/science/article/pii/S1434841119320436},
	author = {E Garcia-Marin and J L Masa-Campos and P Sanchez-Olivares}
}
@article {20_EDU_PABLO_ARRAY_GUIA_CUADRADA,
	title = {Dual Circularly Polarized Array Antenna based on Corporate Feeding Network in Square Waveguide Technology},
	journal = {IEEE Transactions on Antennas and Propagation},
	year = {2020},
	pages = {1-1},
	keywords = {Antenna arrays, omnidirectional antennas, Slot antennas},
	issn = {1558-2221},
	doi = {10.1109/TAP.2020.3019355},
	author = {E Garcia-Marin and J L Masa-Campos and P Sanchez-Olivares and J A Ruiz-Cruz}
}
@conference {20_EUCAP2020_ARRAY_DUAL_BOWTIE_EDUARDO,
	title = {Dual Circularly Polarized Waveguide Array Antenna Formed by Full-Metallic Bow-tie Radiating Cavities},
	booktitle = {2020 14th European Conference on Antennas and Propagation (EuCAP)},
	year = {2020},
	month = {March},
	pages = {1-5},
	abstract = {A full-metallic dual circularly polarized antenna based on an array of bow-tie shaped radiating elements is presented in this contribution. The radiating element, formed by a bow-tie shaped cavity, can generate dual circular polarization. It is fed by a square waveguide path that supports the two degenerate modes TE10 and TE01. The excitation of the TE10 mode in the input port generates left-hand circular polarization while the TE01 mode generates right-hand circular polarization. Furthermore, a dual circularly polarized array antenna formed by bow-tie radiating elements has been designed. The two degenerate modes TE10 and TE01 are supported by a four-way feeding network implemented in square waveguide technology. Both the single radiating element and the dual circularly polarized array have been fabricated by CNC milling techniques. A pure circular polarization performance, high gain or high efficiency have been obtained, experimentally validating the dual circularly polarized bow-tie element in an array configuration.},
	keywords = {antenna diversity, Aperture antennas, Dual-polarized antennas, waveguide arrays},
	doi = {10.23919/EuCAP48036.2020.9135228},
	author = {E Garcia-Marin and P Sanchez-Olivares and J L Masa-Campos and J A Ruiz-Cruz and J Herranz-Alpanseque}
}
@article {20_ANTENA_ARRAY_DUAL_SLOT_BOMBARDERO_KUMAR,
	title = {Dual-linearly polarized travelling-wave array antenna based on triple plus slots fed by square waveguide},
	journal = {AEU - International Journal of Electronics and Communications},
	volume = {119},
	year = {2020},
	pages = {153176},
	abstract = {A dual-linearly polarized travelling-wave array antenna design at Ku-band composed by a novel single element named as triple plus slot is presented. It is formed by a plus slot with an additional pair of short auxiliary slots. The generation of the dual polarization is based on the two degenerated modes TE10 and TE01 supported by a square waveguide following a series feeding topology. Following the operation principle of the conventional plus slot, the transversal slot is only excited by the TE10 mode to generate vertical polarization while the longitudinal slot is only excited by the TE01 mode to generate horizontal polarization. The auxiliary slots provide new degrees of freedom to the antenna design process that allow to accomplish some strict requirements and overcome some design issues. Thus, the proposed triple plus slot has been experimentally validated in a dual-linearly polarized travelling-wave array configuration. The antenna has been fabricated and measured, providing some features such as high efficiency (>80\%), high gain (>13~dB) with a 1~dB-gain bandwidth higher than 10\%, grating lobe mitigation, high isolation between orthogonal polarizations (>25~dB) as well as a fractional impedance bandwidth (S11~<~-14~dB) higher than 11.7\% (from 16 to 18~GHz).},
	keywords = {Antenna arrays, Dual-polarized antennas, Slot antennas},
	issn = {1434-8411},
	doi = {https://doi.org/10.1016/j.aeue.2020.153176},
	url = {http://www.sciencedirect.com/science/article/pii/S1434841119332042},
	author = {P Sanchez-Olivares and J L Masa-Campos and E Garcia-Marin and D Barrio-Tejedor and P Kumar}
}
@article {20_TAP_PABLO_ESCALONA_SLOT_CONFORMAL_CIRCULAR_WAVEGUIDE,
	title = {High-Gain Conical-Beam Traveling-Wave Array Antenna Based on a Slotted Circular Waveguide at $Ku$ -Band},
	journal = {IEEE Transactions on Antennas and Propagation},
	volume = {68},
	number = {8},
	year = {2020},
	month = {Aug},
	pages = {6435-6440},
	abstract = {A high-gain conical-beam traveling-wave array antenna based on a slotted circular waveguide is designed at the higher part of Ku-band. A single radiating element is formed by a ring of eight equally spaced slots fed by a circular waveguide. The excitation of the nonfundamental TM01 mode provides a uniform feeding distribution to each slot, generating an omnidirectional radiation performance. Thus, an array antenna formed by 48 rings of slots is proposed following the design rules of traveling-wave arrays. Every ring is properly designed to achieve a uniform power distribution and consequently maximum directivity for the array antenna performance. The distance between elements is also adjusted to obtain the better input matching response and mitigate the grating lobe appearance, generating a high-gain conical-beam radiation performance suitable for satellite and fifth-generation communications. The proposed antenna design has been manufactured in plastic material by using a 3-D printing process and plated by a spray metallization process. A -10 dB impedance bandwidth higher than 23\%, high-gain values around 13.5 dB, or total efficiency higher than 98\% has been achieved for the whole frequency band.},
	keywords = {Antenna arrays, antenna radiation patterns, circular waveguides, Couplings, Dipole antennas, omnidirectional antennas, Slot antennas},
	issn = {1558-2221},
	doi = {10.1109/TAP.2020.2970031},
	author = {P Sanchez-Olivares and J L Masa-Campos and E Garcia-Marin and D Escalona-Moreno}
}
@conference {20_EUCAP2020_LENTE_BOULDER_EDUARDO,
	title = {Ka-band Multi-beam Planar Lens Antenna for 5G Applications},
	booktitle = {2020 14th European Conference on Antennas and Propagation (EuCAP)},
	year = {2020},
	month = {March},
	pages = {1-5},
	abstract = {A low-cost solution for multi-beam antenna systems is explored for 5G applications in the 26-GHz band. A 4-port stacked-patch microstrip antenna is used as feeder of a perforated flat lens. Each feeder is placed in a different position with respect to the lens, yielding four high-directivity independent beams. The beams cover an angular range from broadside to a 30-degree steering with a gain over 18 dB. The antenna has been implemented by low-cost processes, employing Printed Circuit Board fabrication for the feeder and 3D printing for the lens.},
	keywords = {5G mobile communication, Beam steering, Microstrip antennas},
	doi = {10.23919/EuCAP48036.2020.9135364},
	author = {E Garcia-Marin and D S Filipovic and J L Masa-Campos and P Sanchez-Olivares}
}
@article {20_LENTE_PARCHES_BOULDER_EDUARDO,
	title = {Low-cost lens antenna for 5G multi-beam communication},
	journal = {Microwave and Optical Technology Letters},
	volume = {n/a},
	number = {n/a},
	year = {2020},
	abstract = {Abstract A planar dielectric lens has been designed for low-cost multi-beam antennas in the 26-GHz band of 5G communications. The lens feeder is a stacked-patch microstrip antenna with four input ports, thus permitting four independent high-directivity radiation beams. Maximum steering of 25{\textdegree} can be attained, which a simulated gain over 18 dB for all scanning angles. The antenna has been implemented with low-cost manufacturing techniques. The feeder is fabricated as a printed circuit board, while the lens is realized as a perforated 3D-printed dielectric piece. Experimental results confirm the multi-beam capability of the lens system, suggesting that the spillover efficiency can be improved in further works.},
	keywords = {5G mobile communication, Beam steering, Microstrip antennas},
	doi = {10.1002/mop.32486},
	url = {https://onlinelibrary.wiley.com/doi/abs/10.1002/mop.32486},
	author = {E Garcia-Marin and D S Filipovic and J L Masa-Campos and P Sanchez-Olivares}
}
@article {20_IEEE ACCESS_LUCAS POLO_ARRAY DESFASADORES TORNILLOS,
	title = {Mechanically Reconfigurable Linear Phased Array Antenna Based on Single-Block Waveguide Reflective Phase Shifters With Tuning Screws},
	journal = {IEEE Access},
	volume = {8},
	year = {2020},
	pages = {113487-113497},
	abstract = {This work presents the design and prototyping of a reconfigurable phased array in Ku band (16 to 18 GHz) implemented in waveguide technology. The design is based on the use of a novel seamless waveguide module integrating four reconfigurable phase shifters to adjust the relative phase shift between the unitary elements of a linear array, which are illuminated uniformly by a corporate waveguide feeding network. The phase shifters are implemented by a 90{\textdegree} hybrid coupler in waveguide technology where two of its ports are loaded with a tunable reactive load, implemented in this proof of concept with a tuning screw. The four phase shifters have been manufactured in a single part using direct metal laser sintering, avoiding the losses related to bad electric contacts and misalignments associated to multipart devices. This also simplifies the assembly of the full phased array, leading to a modular approach with three parts whose design can be addressed separately. The experimental results for the complete array antenna show great performance and demonstrate that the main-lobe of the radiation pattern can be effectively scanned continuously between the angles -25{\textdegree} and 25{\textdegree}, with a high efficiency in the whole design band thanks to the proposed waveguide implementation.},
	keywords = {antenna radiation patterns, Beam steering, Couplers, Fasteners, linear antenna arrays, phase shifters, Phased arrays},
	issn = {2169-3536},
	doi = {10.1109/ACCESS.2020.3003193},
	author = {L Polo-Lopez and J L Masa-Campos and A T Muriel-Barrado and P Sanchez-Olivares and E Garcia-Marin and J C{\'o}rcoles and J A Ruiz-Cruz}
}
@article {19_ANT_MAG_PABLO_PAULA_CONFORMADA_DIODOSPIN_3_5GHZ,
	title = {Circular Conformal Array Antenna With Omnidirectional and Beamsteering Capabilities for 5G Communications in the 3.5-GHz Range [Wireless Corner]},
	journal = {IEEE Antennas and Propagation Magazine},
	volume = {61},
	number = {4},
	year = {2019},
	month = {Aug},
	pages = {97-108},
	keywords = {5G communications, 5G mobile communication, 5G terrestrial communications, Antenna arrays, antenna radiation patterns, array elements, array signal processing, Beam steering, circular conformal array antenna, Conformal antenna, Conformal antennas, conformal structure, double-stacked microstrip patches, eight-way tunable feeding network, frequency 3.5 GHz, Frequency measurement, microstrip, microstrip antenna arrays, octagonal holding structure, omnidirectional antennas, omnidirectional radiation, P-i-n diodes, Power dividers, single radiating elements, T-junction operation modes, TFN network, tunable T-junctions},
	issn = {1558-4143},
	doi = {10.1109/MAP.2019.2920049},
	author = {P Sanchez-Olivares and P Sanchez-Dancausa and J L Masa-Campos and M Iglesias-Menendez-de-la-Vega and E Garcia-Marin}
}
@conference {19_URSI_PABLO_CONICAL_ARRAY_SLOTTED_ESCALONA,
	title = {Conical-beam travelling-wave array antenna based on slotted circular waveguide at Ku-band},
	booktitle = {Simposium Nacional URSI 2019},
	year = {2019},
	month = {September},
	abstract = {A high-gain conical-beam travelling-wave array antenna based on a slotted circular waveguide is designed at the higher part of Ku-band (16-18 GHz). The single radiating element is formed by a ring of equally spaced slots fed by a circular waveguide. The excitation of the TM01 mode provides a uniform feeding distribution to each slot, generating an omnidirectional radiation performance. Thus, an array antenna formed by 48 rings of slots is proposed following the conventional design rules of travelling-wave arrays. Every ring is optimized to achieve a uniform power distribution and consequently maximum directivity for the array antenna performance. The distance between elements is also adjusted to obtain the better input matching response and mitigate the grating lobe appearance, generating a high-gain conical-beam radiation performance suitable for satellite communications. The proposed design has been manufactured by using a 3D printing process. Input matching under -15 dB, high-gain values around 13.5 dB or total efficiency higher than 98\% have been achieved for the whole frequency band.},
	author = {P Sanchez-Olivares and J L Masa-Campos and D Escalona-Moreno and E Garcia-Marin}
}
@conference {19_URSI_EDUARDO_MONOPULSO_DIF_BONDING,
	title = {Diffusion-bonded circularly polarized W-band monopulse array antenna},
	booktitle = {Simposium Nacional URSI 2019},
	year = {2019},
	month = {September},
	abstract = {A W-band circularly polarized antenna array with monopulse capability has been designed and fabricated by diffusion bonding of copper plates. The antenna is presented as a proof of concept for a space debris radar project. A waveguide monopulse beamforming network provides monopulse operation in the two main radiation planes. The feeding network is implemented in waveguide technology as well, with corporate topology and amplitude tapering to ensure adequate radiation patterns for the monopulse system. Circular polarization is straightforwardly achieved by hexagonal-shaped radiating cavities. Experimental results validate diffusion bonding for complex multilayer antenna fabrication at W-band, providing a bandwidth over 10\% for axial ratio under 3 dB, impedance matching under -10 dB and total efficiency over 75\%.},
	author = {E Garcia-Marin and J L Masa-Campos and P Sanchez-Olivares}
}
@conference {19_EUCAP_PABLO_ANTENA_BOMBARDERO,
	title = {Dual Polarized Travelling-Wave Array Antenna Formed by Printed Cross Slots},
	booktitle = {2019 13th European Conference on Antennas and Propagation (EuCAP)},
	year = {2019},
	month = {March},
	pages = {1-5},
	keywords = {Antenna arrays, Antenna measurements, Arrayed waveguide gratings, Couplings, dual linear polarization, dual polarization, dual polarized array antenna, dual polarized travelling-wave array antenna, electromagnetic wave polarisation, linear antenna arrays, linear orthogonal polarizations, longitudinal slots, microstrip antenna arrays, mutual coupling effects, printed cross slots, rectangular waveguides, slot antenna arrays, Slot antennas, square waveguide feeding, transversal slots},
	issn = {null},
	url = {https://ieeexplore.ieee.org/document/8740194},
	author = {P Sanchez-Olivares and J L Masa-Campos and P Kumar and E Garcia-Marin}
}
@conference {19_IMWS_AMP_EDUARDO_INKJET_PATCH_MALAGA,
	title = {Ink-jet Implementation of Stacked-Patch Antenna for Wireless Applications},
	booktitle = {2019 IEEE MTT-S International Microwave Workshop Series on Advanced Materials and Processes for RF and THz Applications (IMWS-AMP)},
	year = {2019},
	month = {July},
	pages = {151-153},
	keywords = {antenna bandwidth, Antenna measurements, Antennas, Bandwidth, conductive silver ink, dielectric materials, frequency 5.0 GHz, high-impact polystyrene substrate, Hip, ink jet printing, ink-jet implementation, ink-jet printing, Kapton film, Kapton layer, mechanical stability, microstrip, Microstrip antennas, microstrip lines, Patch antennas, silver, stacked-patch antenna, Substrates, Three-dimensional printing, wireless applications, Wireless LAN},
	issn = {null},
	doi = {10.1109/IMWS-AMP.2019.8880078},
	author = {E Garcia-Marin and E M{\'a}rquez-Segura and P Sanchez-Olivares and J L Masa-Campos and J A Ruiz-Cruz and C Camacho-Pe{\~n}alosa}
}
@article {19_ANT_MAG_EDUARDO_5G_SIW,
	title = {Planar Array Topologies for 5G Communications in Ku Band [Wireless Corner]},
	journal = {IEEE Antennas and Propagation Magazine},
	volume = {61},
	number = {2},
	year = {2019},
	month = {April},
	pages = {112-133},
	keywords = {5G communication environment, 5G communications, 5G mobile communication, antenna array, Antenna arrays, antenna feeds, antenna radiation patterns, dielectric losses, directivity performance, feeding network configurations, Ku band, microstrip, microstrip antenna arrays, Microstrip antennas, microstrip dielectric loss, planar antenna arrays, planar array topologies, radiating elements, SIW feeding network, SIW technologies, substrate integrated waveguide, substrate integrated waveguides, Substrates, two-level corporate feeding network},
	issn = {1558-4143},
	doi = {10.1109/MAP.2019.2895633},
	author = {E Garcia-Marin and J L Masa-Campos and P Sanchez-Olivares}
}
@article {19_ANT_MAG_EDUARDO_5G_SIW,
	title = {Planar Array Topologies for 5G Communications in Ku Band [Wireless Corner]},
	journal = {IEEE Antennas and Propagation Magazine},
	volume = {61},
	number = {2},
	year = {2019},
	month = {April},
	pages = {112-133},
	keywords = {5G communication environment, 5G communications, 5G mobile communication, antenna array, Antenna arrays, antenna feeds, antenna radiation patterns, dielectric losses, directivity performance, feeding network configurations, Ku band, microstrip, microstrip antenna arrays, Microstrip antennas, microstrip dielectric loss, planar antenna arrays, planar array topologies, radiating elements, SIW feeding network, SIW technologies, substrate integrated waveguide, substrate integrated waveguides, Substrates, two-level corporate feeding network},
	issn = {1558-4143},
	doi = {10.1109/MAP.2019.2895633},
	author = {E. Garcia-Marin and J. L. Masa-Campos and P. Sanchez-Olivares}
}
@conference {19_EUCAP_EDUARDO_MONOPULSO_DIFF_BONDING,
	title = {W-band Monopulse Antenna Array Manufactured by Diffusion Bonding},
	booktitle = {2019 13th European Conference on Antennas and Propagation (EuCAP)},
	year = {2019},
	month = {March},
	pages = {1-5},
	keywords = {16 circularly polarized radiating cavities, antenna feeds, antenna radiation patterns, array signal processing, beamforming network, copper sheets, corporate waveguide feeding network, Diffusion bonding, diffusion bonding technology, electromagnetic wave polarisation, etching, etching proces, frequency 90.0 GHz to 98.0 GHz, impedance matching, input matching, millimeter wave technology., millimetre wave antenna arrays, monopulse capabilities, noise figure -10.0 dB, noise figure -15.0 dB, noise figure -20.0 dB, noise figure 2.0 dB, Planar arrays, principal radiation planes, radar antennas, simulated axial ratio, Taylor distribution, W-band monopulse array antenna},
	issn = {null},
	url = {https://ieeexplore.ieee.org/document/8739388},
	author = {E Garcia-Marin and J L Masa-Campos and P Sanchez-Olivares}
}
@conference {18_URSI_PABLO_SANCHEZ,
	title = {Conformal Patch Array Antenna with Switchable Omnidirectional or Sectorial Coverage at 3.5 GHz},
	booktitle = {Simposium Nacional URSI 2018},
	year = {2018},
	month = {September},
	abstract = {A circularly conformal array antenna with beam steering capabilities as well as omnidirectional performance in S-band is presented. The single radiating elements are formed by double stacked microstrip patches placed on the planar faces of an octagonal supporting structure fabricated with a 3D printer. An eight-way tunable feeding network in microstrip technology is designed, manufactured and integrated into the conformal structure in order to excite the array elements. Novel tunable T-junctions based on PIN diodes are proposed to form the tunable feeding network. This novel T-junction allows a splitting configuration with uniform distribution to the two output ports, or a switching mode to deliver the signal to either output port. In all T-junction operation modes, a good input matching performance is achieved. The tunable feeding network is integrated into the conformal antenna and digitally controlled by a microcontroller Arduino UNO. A total of 29 states, grouped in 6 modes with a global matching bandwidth of 17.2\% can be selected. An omnidirectional radiation as well as beam steered directional patterns (covering 360 deg) can be electronically selected. The proposed antenna is able for future 5G terrestrial communications in the 3.5 GHz IMT range.},
	author = {P Sanchez-Olivares and P P Sanchez-Dancausa and J L Masa-Campos and M Iglesias-Menendez-de-la-Vega and E Garcia-Marin}
}
@article {18_COMM_MAG_EDUARDO_DIFF_BONDING1,
	title = {Diffusion Bonding Manufacturing of High Gain W-Band Antennas for 5G Applications},
	journal = {IEEE Communications Magazine},
	volume = {56},
	number = {7},
	year = {2018},
	month = {July},
	pages = {21-27},
	abstract = {The incoming 5G systems propose unprecedented communication capabilities that require a maximization of the channel and spectrum exploitation. Waveguide antenna arrays can play an important role in 5G environments due to their high performance in terms of efficiency and bandwidth. Moreover, higher frequencies appear necessary in order to achieve the requirements of channel capacity and spectrum bandwidth. At millimeter-wave frequencies, new challenges for the design and fabrication of the communication devices are encountered. The feasibility of traditional manufacturing techniques and conventional additive manufacturing processes severely decreases, since part tolerances, assembly, and alignment become critical for the antenna performance. In order to illustrate the possibilities of the diffusion bonding technique applied to waveguide antennas operating in the W-band of 5G systems, a circularly polarized cavity array has been successfully manufactured. This manufacturing process provides the advantages of both traditional and additive manufacturing. A 5.6 percent effective bandwidth at 90 GHz has been experimentally obtained with reflected power under 10 percent, axial ratio below 3 dB, and antenna efficiency over 50 percent.},
	keywords = {5G mobile communication, Antenna arrays, Diffusion bonding, Three-dimensional printing},
	issn = {0163-6804},
	doi = {10.1109/MCOM.2018.1700986},
	author = {E Garcia-Marin and J L Masa-Campos and P Sanchez-Olivares}
}
@conference {18_EUCAP_PABLOSANCHEZ_Array_RPS_varactor,
	title = {Electronically reconfigurable microstrip array antenna with reflective phase shifters at Ku band},
	booktitle = {12th European Conference on Antennas and Propagation (EuCAP 2018)},
	year = {2018},
	month = {April},
	pages = {1-5},
	keywords = {Patch antennas, phase shifters, Phased arrays},
	doi = {10.1049/cp.2018.1134},
	author = {E Garcia-Marin and P Sanchez-Olivares and J Herranz-Alpanseque and A J Martin-Trueba and J L Masa-Campos and J C{\'o}rcoles-Ortega}
}
@article {18_AWPL_EDUARDO-GARCIA_EVALUATION_ADD_MANUF,
	title = {Evaluation of Additive Manufacturing Techniques Applied to Ku-Band Multilayer Corporate Waveguide Antennas},
	journal = {IEEE Antennas and Wireless Propagation Letters},
	volume = {17},
	number = {11},
	year = {2018},
	month = {Nov},
	pages = {2114-2118},
	keywords = {additive manufacturing techniques, Antenna arrays, antenna feeds, antenna layers, antenna prototypes, Aperture antennas, axial ratio, conventional milling, corporate-fed waveguide array antenna, digital communication, direct broadcasting by satellite, direct metal laser sintering, DMLS antenna, electrical performance, end-user digital broadcast satellite communications, gain ratio, impedance matching, intricate multilayer structure, Ku-band multilayer corporate waveguide antennas, laser sintering, layered manufacturing, Metals, Milling, multilayer structure, multilayers, Planar arrays, prototypes, rapid prototyping (industrial), reference prototype, reliability, satellite antennas, single block fabrication, slot antenna arrays, stereolithography, Three-dimensional printing, waveguide antenna implementation},
	issn = {1536-1225},
	doi = {10.1109/LAWP.2018.2866631},
	author = {E Garcia-Marin and J L Masa-Campos and P Sanchez-Olivares and J A Ruiz-Cruz}
}
@conference {18_URSI_EDUARDO_GARCIA,
	title = {Fabricaci{\'o}n por Diffusion Bonding de Agrupaciones de Antenas en Gu{\'\i}a de Onda para Banda W},
	booktitle = {Simposium Nacional URSI 2018},
	year = {2018},
	month = {September},
	abstract = {Millimeter-wave radiating systems appear attractive for radiofrequency applications like radio-positioning or telecommunications. High-gain array antennas can be implemented in reduced-size devices in this part of the frequency spectrum. Waveguide implementations seem indispensable to mitigate the dissipation losses inherent to these frequencies. Nevertheless, the implementation of multilayer waveguide array antennas is a challenge. Electrical contact between the antenna layers must be guaranteed to prevent power leakage, which is ensured only in part with mechanical tightening. Additive manufactured antenna arrays provide electrical continuity, although dimensional accuracy diminishes and dissipation losses increase owing to surface roughness and reduced conductivity. In this context, diffusion bonding allows complex multilayer designs by joining accurately-etched metallic sheets without additional sticking or tightening material. A corporate-fed waveguide antenna array is presented in this paper to experimentally validate this manufacturing technique for W-band implementations.},
	author = {E Garcia-Marin and J L Masa-Campos and P Sanchez-Olivares}
}
@conference {8439652,
	title = {Implementation of Millimeter Wave Antenna Arrays by Diffusion Bonding},
	booktitle = {2018 11th Global Symposium on Millimeter Waves (GSMM)},
	year = {2018},
	month = {May},
	pages = {1-4},
	keywords = {Antenna arrays, Diffusion bonding, Millimeter wave communication, Millimeter wave radar, millimeter wave technology, Planar arrays},
	doi = {10.1109/GSMM.2018.8439652},
	author = {E Garcia-Marin and J L Masa-Campos and P Sanchez-Olivares}
}
@conference {17_EUCAP_EDUARDOGARCIA_4x4_stackedPatch_eucap,
	title = {W-band array antenna for radar detection of space debris},
	booktitle = {12th European Conference on Antennas and Propagation (EuCAP 2018)},
	year = {2018},
	month = {April},
	pages = {1-4},
	keywords = {millimeter wave technology, Planar arrays, radar antennas},
	doi = {10.1049/cp.2018.0737},
	author = {E Garcia-Marin and J L Masa-Campos and P Sanchez-Olivares}
}
@conference {17_URSI_EDUARDO-GARCIA_diffusionbonding_antenna,
	title = {Diffusion-bonded Circularly Polarized Corporate-Fed Cavity Array for W-band},
	booktitle = {Simposium Nacional URSI 2017},
	year = {2017},
	month = {September},
	abstract = {A circularly polarized radiating cavity array has been designed at 94 GHz and manufactured by the innovative technique of diffusion bonding of thin metallic layers, introduced to the European research community for the first time. The array is composed of 16x16 radiating elements, fed by a two-level waveguide corporate feeding network with uniform distribution. A 5.5 \% bandwidth has been experimentally achieved with matching under -10 dB and axial ratio below 3 dB. At 90 GHz, 30.6 dBi gain and 0.4 dB axial ratio have been measured. The experimental results are considered successful and further improvements in the manufacturing process are expected to refine the performance of the antenna in future prototypes.},
	author = {E Garcia-Marin and J L Masa-Campos and P Sanchez-Olivares}
}
@conference {17_EUCAP_EDUARDOGARCIA_4x4_stackedPatch_eucap,
	title = {Implementation of 4 {\texttimes} 4 stacked patch array with corporate feeding network for Ku-band applications},
	booktitle = {Antennas and Propagation (EUCAP), 2017 11th European Conference on},
	year = {2017},
	month = {March},
	pages = {1967-1971},
	abstract = {In this work, the experimental implementation of a 4 x 4 stacked-patch array with linear polarization and a corporate feeding network for Ku-band is exposed. The feeding network is split into two levels, with an initial power distribution in Substrate Integrated Waveguide and a second distribution in microstrip technology. The experimental results show a matching coefficient better than -10 dB in a 15.9\% bandwidth. In addition, the measured gain attains 16.8 dBi, 0.8 dB below the simulated gain, while radiation efficiency is 66 \%. The structure is validated for higher-gain arrays, and hence designs of 8 x 8 and 16 x 16 radiating elements are also proposed and the simulated results presented. Therefore, antennas with several gain values are available in order to suit the different elements of the communication system, such as the end user and the base station.},
	keywords = {antenna, array, corporate feeding, linear polarization, microstrip, replication., SIW, stacked patch},
	doi = {10.23919/EuCAP.2017.7928530},
	url = {http://ieeexplore.ieee.org/stamp/stamp.jsp?tp=\&arnumber=7928530},
	author = {E Garcia-Marin and J L Masa-Campos and P Sanchez-Olivares}
}
@conference {17_URSI_PABLO-SANCHEZ_conformalarray_reconfig,
	title = {Reconfigurable Conformal Antenna in Radial Waveguide Technology},
	booktitle = {Simposium Nacional URSI 2017},
	year = {2017},
	month = {September},
	abstract = {This work proposes a compact conformal array antenna using radial waveguide technology. The conformal structure is approximated as a regular prism with planar faces to obtain a significant manufacturing cost reduction. It provides a mechanical technique to reconfigure the antenna radiation pattern in the azimuth plane, based on the insertion of several metallic screws into the radial feeding network. Depending on the inserted-screw configuration, the electric field distribution in the radial waveguide network is modified. Therefore, the feeding distribution of the single radiating elements is controlled. The radiation pattern can be mechanically reconfigured from omnidirectional to directional behavior, achieving a main beam scanning every 45 deg in the azimuth plane.},
	author = {P Sanchez-Olivares and J L Masa-Campos and E Garcia-Marin}
}
@conference {17_NEMO_EDU_JUAN_CAD2_ANTENNA,
	title = {Slotted Waveguide Antenna Design by Segmented Simulation and Multi-Objective Genetic Algorithm},
	booktitle = {IEEE MTT-S International Conference on Numerical Electromagnetic and Multiphysics Modeling and Optimization for RF, Microwave and Terahertz Applications (NEMO)},
	year = {2017},
	month = {May},
	abstract = {A progressive-wave antenna automated design technique is presented in this work. By means of a simulation method based on spherical wave expansion and generalized scattering matrix, full-wave analysis of a slotted waveguide array can be efficiently performed. Since coupling effects are considered in the simulation, a final antenna design can be obtained without any further modification required on it. In order to achieve such design, a multi-objective optimization based on Nondominated Sorting Genetic Algorithm Version III (NSGA-III) state-of-theart genetic algorithm is carried out. At the working frequency of 17 GHz, final design provides a 16.6 dBi gain, Side-Lobe Levels lower than -18.3 dB and a 0.6\% power waste at the output port. A -15-dB matching bandwidth of an 8.8\% is obtained. The results have been validated with commercial-software simulations.},
	author = {E Garcia-Marin and J C{\'o}rcoles and J Rubio and J L Masa-Campos and P Sanchez-Olivares}
}
@conference {16_EUCAP_EDUARDOGARCIA_patcharray4x4,
	title = {4 {\texttimes} 4 stacked patch array with siw and microstrip corporate feeding network for ku-band},
	booktitle = {Antennas and Propagation (EUCAP), 2016 10th European Conference on},
	year = {2016},
	month = {April},
	pages = {1-4},
	abstract = {A 4 {\texttimes} 4 linearly-polarized stacked-patch array with a fully corporate feeding network for Ku-band is presented in its work. Antenna replication in larger arrays is straightforward with this corporate approach, which in addition prevents unintended main beam steering. The feeding structure is divided in two levels, where the first power distribution is made in Substrate Integrated Waveguide and the second in microstrip technology. This procedure takes advantage of the strengths of each technology, combining waveguide low losses with microstrip versatility. A 18.4-dBi gain is attained in simulation with matching better than -14 dB in the entire bandwidth.},
	keywords = {antenna, array, corporate feeding, linear polarization, microstrip, replication, SIW, stacked patch},
	author = {E Garcia-Marin and J L Masa-Campos and P Sanchez-Olivares}
}
@conference {16_URSI_EDUARDO-GARCIA_4by4patcharray,
	title = {Agrupaci{\'o}n plana de parches apilados con alimentaci{\'o}n corporativa en tecnolog{\'\i}a mixta SIW-microstrip para banda Ku},
	booktitle = {Simposium Nacional URSI 2016},
	year = {2016},
	month = {September},
	abstract = {A 4 x 4 linearly-polarized stacked-patch array with a fully corporate feeding network for Ku-band is presented in its work. Antenna replication in larger arrays is straightforward with this corporate approach, which in addition prevents unintended main beam steering. The feeding structure is divided in two levels, where the first power distribution is made in Substrate Integrated Waveguide and the second in microstrip technology. This procedure takes advantage of the strengths of each technology, combining waveguide low losses with microstrip versatility. A 18.6-dBi gain is attained in simulation with matching better than -14 dB in the entire bandwidth.},
	author = {E Garcia-Marin and J L Masa-Campos and P Sanchez-Olivares}
}
@article {izquierdo2016efficient,
	title = {Efficient radiation antenna modeling via orthogonal matching pursuit in terms of infinitesimal dipoles},
	journal = {IEEE Antennas and Wireless Propagation Letters},
	volume = {15},
	year = {2016},
	pages = {444{\textendash}447},
	publisher = {IEEE},
	author = {Izquierdo, Juan F and Rubio, Jes{\'u}s and J C{\'o}rcoles and G{\'o}mez-Alcal{\'a}, Rafael}
}
@article {16_2x2_patcharray_Eduardo_MOTL,
	title = {Linearly polarized small patch array fed by corporate SIW network},
	journal = {Microwave and Optical Technology Letters},
	volume = {58},
	number = {3},
	year = {2016},
	month = {Mar.},
	pages = {587 - 593},
	abstract = {In this article, a linearly polarized 2 {\texttimes} 2 patch array uniformly fed by a corporate substrate integrated waveguide network for Ku band is presented. Undesired main beam steering is avoided by means of a fully corporate feeding network, although grating lobes may appear due to greater separation between radiating elements. Moreover, a reduced patch separation to avoid grating lobe appearance leads to an antenna matching coefficient degradation due to the proximity of antenna discontinuities. In consequence, a tradeoff approach has been developed, achieving a measured 4.1\% matching bandwidth and a measured gain of 13.27 dBi, which corresponds to an 86\% radiation efficiency. Good agreement between simulated and measured results is observed in all cases},
	issn = {1098-2760},
	doi = {10.1002/mop.29628},
	url = {http://onlinelibrary.wiley.com/doi/10.1002/mop.29628/epdf},
	author = {E Garcia-Marin and J L Masa-Campos and P Sanchez-Olivares}
}
@conference {rubio2016shaped,
	title = {Shaped beam synthesis of sparse arrays of coupled elements through a modified Orthogonal Matching Pursuit algorithm and multiple dictionaries},
	booktitle = {Antennas and Propagation (EuCAP), 2016 10th European Conference on},
	year = {2016},
	pages = {1{\textendash}3},
	publisher = {IEEE},
	organization = {IEEE},
	author = {Rubio, Jes{\'u}s and J C{\'o}rcoles and Izquierdo, Juan F and G{\'o}mez-Alcal{\'a}, Rafel and Gil, Jos{\'e} M}
}
@conference {15_EUCAP_EDUARDOGARCIA_patcharray2x2,
	title = {2 {\texttimes} 2 stacked patch array with corporate SIW feeding network},
	booktitle = {Antennas and Propagation (EUCAP), 2015 9th European Conference on},
	year = {2015},
	month = {April},
	pages = {1-4},
	abstract = {A linearly polarized 2x2 patch array fed by a corporate Substrate Integrated Waveguide network for Ku band is presented. The utilization of a corporate topology in the feeding network prevents the antenna from suffering an unintended main lobe tilt dispersion. Nevertheless, the interelement spacing increases, and so does the Side-Lobe Level. Reducing this spacing implies closer discontinuities, such as bends and T-junctions. This degrades the reflection coefficient. Hence, a tradeoff solution has been designed and manufactured, achieving a Side-Lobe Level better than -11 dB and a measured bandwidth similar to the expected in the simulation stage, being 4.1 \% at -10 dB. The measured gain reaches 13.27 dB, which corresponds to an 86\% radiation efficiency.},
	keywords = {antenna, array, corporate feed, linear polarization., SIW, stacked patch},
	author = {E Garcia-Marin and J L Masa-Campos and P Sanchez-Olivares}
}
@conference {15_URSI_EDUARDO-GARCIA_patcharray2x2,
	title = {Agrupaci{\'o}n Plana de Doble Parche Apilado con Alimentaci{\'o}n Corporativa sobre SIW},
	booktitle = {Simposium Nacional URSI 2015},
	year = {2015},
	month = {September},
	abstract = {In this work, a planar stacked patch array for Ku band fed by a fully corporate Substrate Integrated Waveguide network is proposed. Corporate topology prevents an unintended main beam steering effect that reduces the antenna bandwidth in progressive wave structures. Nevertheless, an increase in the spacing between radiating elements occurs, worsening the Side- Lobe Level figure. A reduction in such spacing implies closer discontinuities, namely bends and power dividers, and thus reflection coefficient is degraded. Therefore, a tradeoff solution is presented, where a measured Side-Lobe Level better that -11 dB and 4.1\% reflection bandwidth are achieved, showing good agreement with the simulated results. A measured gain of 13.27 dBi is attained, corresponding to an 86\% radiation efficiency.},
	author = {E Garcia-Marin and J L Masa-Campos and P Sanchez-Olivares}
}
@article {15_TAP_Rubio_ThinningOMP,
	title = {Array Thinning of Coupled Antennas Based on the Orthogonal Matching Pursuit Method and a Spherical-Wave Expansion for Far-Field Synthesis},
	journal = {Antennas and Propagation, IEEE Transactions on},
	volume = {63},
	number = {12},
	year = {2015},
	month = {Dec},
	pages = {5425-5432},
	abstract = {This work is focused on the array thinning problem in shaped beam far-field synthesis. The orthogonal matching pursuit algorithm, which allows finding sparse solutions in linear systems, is combined with a fast full-wave analysis method for antenna arrays based on a spherical wave expansion, thereby taking mutual coupling between real antennas into account in the thinning process. To this aim, the original iterative algorithm is modified so that the current residual is obtained for the selected real coupled antennas in each step of the algorithm. In this way, the remaining nonselected elements are effectively removed instead of turned off. Results for arrays made up of microstrip patch antennas and dielectric resonator antennas arranged in triangular and rectangular lattices are presented.},
	keywords = {Antenna arrays, array thinning problem, Arrays, coupled antennas, dielectric resonator antennas, far-field synthesis, fast full-wave analysis method, generalized scattering matrix, iterative algorithm, iterative methods, Layout, linear systems, Matching pursuit algorithms, microstrip antenna arrays, microstrip patch antennas, Mutual coupling, orthogonal matching pursuit method, pattern field synthesis, planar array, rectangular lattices, spherical wave expansion, spherical-wave expansion, translational addition theorems, Transmission line matrix methods, triangular lattices},
	issn = {0018-926X},
	doi = {10.1109/TAP.2015.2487506},
	author = {J Rubio and J C{\'o}rcoles and J F Izquierdo and R G{\'o}mez-Alcal{\'a}}
}
@conference {15_URSI_JORGE_INVITADA,
	title = {Desarrollo de componentes pasivos con divisi{\'o}n/combinaci{\'o}n de potencia para sistemas de comunicaciones},
	booktitle = {Simposium Nacional URSI 2015},
	year = {2015},
	month = {September},
	abstract = {This paper addresses the development of passive devices for communication systems working at the microwave frequency band, but also at millimeter-wave and terahertz frequencies. A brief review of different types of passive devices that the authors have been developed for different applications will be made. The paper will be focused on the devices for the last stage of the transmitter/receiver chain in communications systems, where the antennas and other components such as filters, multiplexers, polarizers, dividers/combiners, etc are an essential part. The application of these devices to power combination techniques will be also outlined, which can be used in high-power amplification, but also in other problems as antenna arrays.},
	author = {B Taha-Ahmed and J C{\'o}rcoles-Ortega and R V Haro-Baez and C A Leal-Sevillano and J L Masa-Campos and J R Montejo-Garai and E Garcia-Marin and A Mor{\'a}n-L{\'o}pez and L Polo-Lopez and J M Rebollar-Machain and J A Ruiz-Cruz and P Sanchez-Olivares}
}
@conference {15_EIEC_Rubio_OMP,
	title = {Thinned Arrays by using the orthogonal matching pursuit algorithm and spherical-wave field synthesis},
	booktitle = {X Iberian Meeting on Computational Electromagnetism},
	year = {2015},
	month = {May},
	author = {J Rubio and J C{\'o}rcoles and J F Izquierdo and R G{\'o}mez-Alcal{\'a} and J. Zapata}
}
@article {14_JEMWA_CORCOLES_FULL-WAVEFloquet,
	title = {Full-wave analysis of finite periodic cylindrical conformal arrays with Floquet spherical modes and a hybrid finite element {\textendash} generalized scattering matrix method},
	journal = {Journal of Electromagnetic Waves and Applications},
	volume = {28},
	number = {1},
	year = {2014},
	month = {Jan},
	pages = {102-111},
	abstract = {This work reports a novel approach for the full-wave analysis of a finite conformal array made up of antennas which are periodically arranged on a metallic cylindrical surface. The analysis methodology is based on a hybrid finite element and modal analysis method, and it allows the computation of the generalized scattering matrix of the structure. In this case, spherical vector modes are used to characterize the radiating region and because of the periodic nature of the conformal array, Floquet{\textquoteright}s theory is used to render the methodology efficient and accurate. Therefore, the formulation is derived to be able to characterize the whole structure from the analysis of only one semi-period. Numerical results of arrays made up of rectangular apertures and microstrip patches are presented and compared with the ones obtained with commercial software and infinite models both for conformal and planar arrays.},
	keywords = {cylindrical conformal array, finite element method, Floquet{\textquoteright}s theory, generalized scattering matrix, spherical modes},
	issn = {0920-5071},
	doi = {10.1080/09205071.2013.857280},
	url = {http://www.tandfonline.com/doi/abs/10.1080/09205071.2013.857280$\#$.U57p9vl_vQg},
	author = {J C{\'o}rcoles and Gonz{\'a}lez, M A and Zapata, J}
}
@conference {13_URSIESP_Mecia-OlivaGrajal-de-la-FuenteBadolatoEtAl_Experimentalradarimager300GHz,
	title = {Experimental radar imager with sub-cm range resolution at 300 GHz},
	booktitle = {Proc. 2013 Simposium Nacional URSI (in Spanish)},
	year = {2013},
	month = {Sept.},
	pages = {1-7},
	abstract = {This paper presents a high range resolution radar sensor working in the submillimeter-wave band for standoff detection and security applications. Low-cost technologies have been properly selected in order to implement a versatile and easily scalable radar system. A large operational bandwidth, required for high range resolution, is attained by means of a frequency multiplication-based architecture. This radar system sweeps a bandwidth of 27 GHz. The final application allows the generation of 3D images by means of the radar front-end integrated with a bifocal ellipsoidal Gregorian reflector system. The scene of interest is elliptically scanned at a standoff range of 8 m. In addition, some of the design and fabrication techniques of components at the millimeter and submillimeter-wave bands are presented.},
	author = {Mecia-Oliva, B and Grajal-de-la-Fuente, J and Badolato, A and Garcia-Pino, A and Besada-Sanmartin, J L and C A Leal-Sevillano and J A Ruiz-Cruz and Montejo-Garai, J R and Rebollar, J M}
}
@article {13_AWPL_GARCIA-VALVERDE_PFC,
	title = {Linear Patch Array Over Substrate Integrated Waveguide for Ku-Band},
	journal = {IEEE Antennas and Wireless Propagation Letters},
	volume = {12},
	year = {2013},
	pages = {257-260},
	abstract = {A linearly polarized patch array with direct probe feed over substrate integrated waveguide (SIW) network (LP-PASIW) for Ku-band is presented. A double-stacked microstrip patch structure has been used as radiating elements. Internal SIW coupling patches are placed inside the SIW to obtain the desired radiation pattern. The internal coupling and external radiating patches are connected by means of copper vias. A mutual coupling model is also proposed to adjust the radiation and reflection properties of the array. An antenna prototype has been manufactured and measured. At 17.7 GHz, 16 dBi and 80\% peak gain and efficiency values are obtained. Although a 10\% reflection bandwidth (17-18.6 GHz) is achieved, the usable bandwidth is reduced to 3\% due to array beam tilt dispersion.},
	keywords = {antenna feeds, antenna prototype, antenna radiation patterns, Antennas, array beam tilt dispersion, Arrays, bandwidth 17 GHz to 18.6 GHz, Brain modeling, Couplings, direct probe feed, double-stacked microstrip patch structure, Double-stacked patch, efficiency 80 percent, electromagnetic wave polarisation, external radiating patches, frequency 17.7 GHz, hybrid LSM$^{{rm y}{\textquoteright}}$ mode, internal coupling patches, internal SIW coupling patches, linearly polarized patch array, LP-PASIW, microstrip antenna arrays, microwave antenna arrays, Mutual coupling, mutual coupling model, radiating elements, radiation pattern, Reflection, substrate integrated waveguide (SIW), substrate integrated waveguide network, substrate integrated waveguides, Substrates, waveguide antenna arrays},
	issn = {1536-1225},
	doi = {10.1109/LAWP.2013.2245623},
	url = {http://ieeexplore.ieee.org/stamp/stamp.jsp?tp=\&arnumber=6451111\&tag=1},
	author = {D Garcia-Valverde and J L Masa-Campos and P Sanchez-Olivares and B Taha-Ahmed and J C{\'o}rcoles}
}
@conference {APS-URSI-2013,
	title = {SIW patch array with internal coupling patches},
	booktitle = {Antennas and Propagation Society International Symposium (APSURSI), 2013 IEEE},
	year = {2013},
	month = {July},
	pages = {1800-1801},
	abstract = {A Substrate Integrated Waveguide (SIW) has been used to feed a progressive wave linear array of 16 double stacked patches. The amplitude and phase performance has been achieved by means of coupling patches, which are placed inside the SIW. An antenna prototype has been manufactured with a multilayer PCB structure. 16 dBi and 80 \% peak gain and efficiency values at 17.7 GHz have been measured. A 10\% reflection bandwidth (17 - 18.6 GHz) is achieved, although the usable bandwidth is reduced to 3\% due to the typical array beam tilt dispersion of this kind of designs.},
	keywords = {Antenna measurements, antenna prototype, Antennas, array beam, Arrays, bandwidth 17 GHz to 18.6 GHz, Couplings, double stacked patches, Gain, internal coupling patches, linear antenna arrays, microstrip antenna arrays, Nonhomogeneous media, PCB structure, printed circuits, progressive wave linear array, SIW patch array, substrate integrated waveguide, substrate integrated waveguides, Substrates, tilt dispersion},
	issn = {1522-3965},
	doi = {10.1109/APS.2013.6711559},
	author = {J L Masa-Campos and D Garcia-Valverde and P Sanchez-Olivares and B Taha-Ahmed}
}
@conference {13_EIEC_RubioetAl_SphericalModesinCEM,
	title = {Spherical Modes in Computational Electromagnetics applied to Antenna Problems},
	booktitle = {IX Iberian Meeting on Computational Electromagnetism},
	year = {2013},
	month = {May},
	pages = {1},
	abstract = {In this work we review the use of spherical modes in computational electromagnetics mainly applied to antenna problems. First, the theory of spherical modes will be reviewed. Second, the use jointly with the Finite Element Method will be exposed. Third, the application to the analysis of finite arrays will be shown. Finally, it will be presented how the spherical modes allow us to obtain an equivalent model of the antenna, in terms of infinitesimal dipoles, which increases the capabilities of the method for the analysis of finite arrays.},
	author = {Rubio, J and Izquierdo, J F and Gonz{\'a}lez, M A and Gil, J M and Garc{\'\i}a, J and de la Rubia, V and J C{\'o}rcoles and Zapata, J}
}
@article {13-WT-B-HAPHSUPA,
	title = {WCDMA uplink capacity of high-altitude platforms (HAPs) macrocells with incorporated HSUPA service},
	journal = {Annales des Telecommunications},
	volume = {68},
	number = {9-10},
	year = {2013},
	pages = {569-578},
	url = {http://dx.doi.org/10.1007/s12243-012-0349-0},
	author = {B Taha-Ahmed and Enrique Rebollo Garc{\'\i}a}
}
@article {12_TAP_Corcoles_CombinedArrayThinning,
	title = {Efficient Combined Array Thinning and Weighting for Pattern Synthesis With a Nested Optimization Scheme},
	journal = {IEEE Transactions on Antennas and Propagation},
	volume = {60},
	number = {11},
	year = {2012},
	month = {Nov},
	pages = {5107-5117},
	abstract = {A novel procedure to thin an antenna array which synthesizes a desired pattern with the minimum number of active elements is introduced. The proposed method yields both the active elements and their corresponding excitations of a thinned array having the minimum number of active elements needed to meet several prescribed design specifications of the radiated far-field pattern. Specifications such as achieving a minimum gain, obtaining a pattern with a maximum allowable sidelobe level or synthesizing a shaped beam pattern confined into a mask are considered. Null field directions can also be added. In order to carry out the thinning, a genetic algorithm is used, while computing the excitations is carried out through linear or quadratic programming. The procedure incorporates the generalized scattering matrix analysis of an array made up of elements whose radiated field can be expressed as a spherical mode expansion, thus taking all electromagnetic effects inherently into account. Therefore, since the presence of an element can substantially alter the array features because of mutual coupling, two types of thinning are considered: removing elements or turning them off. Numerical results of arrays made up of isotropic sources, dielectric resonator antennas and microstrip patch antennas are presented.},
	keywords = {Antenna arrays, Arrays, generalized scattering matrix, Genetic algorithms, genetic algorithms (GAs), GSM, linear programming, optimization, quadratic programming (QP), spherical wave expansion, thinned arrays, Transmission line matrix methods, Vectors},
	issn = {0018-926X},
	doi = {10.1109/TAP.2012.2207667},
	url = {http://ieeexplore.ieee.org/stamp/stamp.jsp?tp=\&arnumber=6236035},
	author = {J C{\'o}rcoles and Gonz{\'a}lez, M A}
}
@article {12-WT-B-HighwayHSUPA,
	title = {WCDMA Uplink Capacity of Highways Cigar-Shaped Microcells with Incorporated HSUPA Service},
	journal = {Wireless Personal Communications},
	volume = {65},
	number = {1},
	year = {2012},
	pages = {83-101},
	url = {http://dx.doi.org/10.1007/s11277-011-0229-3},
	author = {B Taha-Ahmed and Enrique Rebollo Garc{\'\i}a}
}
@article {11_TAP_PontesCorcoles_ModalNetworkMIMO,
	title = {Modal Network Model for MIMO Antenna in-System Optimization},
	journal = {IEEE Transactions on Antennas and Propagation},
	volume = {59},
	number = {2},
	year = {2011},
	month = {Feb},
	pages = {643-653},
	abstract = {The analysis of MIMO systems is described with the aid of a novel modal network model. For this purpose the capacity performance of typical base station and mobile station antennas in a simulated macro-cellular scenario with varying antenna inter element spacings and antenna rotation will be studied. The model is based on the modal description of typical receiving and transmitting antennas. In this manner a significant simulation time reduction is achieved which allows for faster analysis and optimization. To prove this the effects of both the mobile and base station antennas are investigated. Moreover, for the more restrictive case of base station antennas, a fully modal descriptive model is proven to yield very similar results as those from measured commercial antennas. It is found that the modal approach improves simulation speed without loss of accuracy or generality. Simulations are done for the city of Karlsruhe with a three-dimensional Ray-tracing tool.},
	keywords = {3D Ray-tracing tool, Antenna arrays, antenna inter element spacing, antenna optimization, antenna rotation, base station antenna, capacity performance, cellular radio, macro-cellular scenario, MIMO antenna, MIMO communication, MIMO network model, MIMO system, mobile antennas, mobile station antenna, modal network model, multiple-input multiple-output (MIMO), network theory, path-based channel models, receiving antenna, receiving antennas, spherical mode expansion, system optimization, transmitting antenna, transmitting antennas},
	issn = {0018-926X},
	doi = {10.1109/TAP.2010.2096179},
	url = {http://ieeexplore.ieee.org/stamp/stamp.jsp?tp=\&arnumber=5654566},
	author = {Pontes, J and J C{\'o}rcoles and Gonz{\'a}lez, M A and Zwick, T}
}
@article {11_TAP_CorcolesRubio_SphericalSynthesis,
	title = {Spherical-Wave-Based Shaped-Beam Field Synthesis for Planar Arrays Including the Mutual Coupling Effects},
	journal = {IEEE Transactions on Antennas and Propagation},
	volume = {59},
	number = {8},
	year = {2011},
	month = {Aug},
	pages = {2872-2881},
	abstract = {An analytical method to synthesize shaped-beam patterns with planar arrays, based on the handling of spherical waves, is proposed. Translational Addition Theorems will be used here for two different purposes: (1) relating the spherical modes produced by each element in the array to calculate the mutual coupling effects, and (2) expressing the field radiated by each element in terms of spherical modes corresponding to the whole array, to carry out a spherical-wave synthesis procedure based on the orthogonal properties of spherical modes. This field synthesis method is based on the fact that any antenna radiated field can be expressed as a discrete series of weighted spherical vector wave functions and it only requires the a priori knowledge of the Generalized Scattering Matrix of each array element considered as isolated from the rest of the array elements.},
	keywords = {antenna feeds, antenna radiated field, antenna radiation patterns, Arrays, electromagnetic coupling, electromagnetic wave scattering, field synthesis method, generalized scattering matrix, GSM, Mutual coupling, mutual coupling effect, pattern field synthesis, planar antenna arrays, planar array, planar array element, Planar arrays, S-matrix theory, Scattering, spherical wave expansion, spherical-wave synthesis procedure, spherical-wave-based shaped-beam field synthesis, translational addition theorem, translational addition theorems, weighted spherical vector wave function},
	issn = {0018-926X},
	doi = {10.1109/TAP.2011.2158950},
	url = {http://ieeexplore.ieee.org/stamp/stamp.jsp?tp=\&arnumber=5871276},
	author = {J C{\'o}rcoles and Rubio, J and Gonz{\'a}lez, M A}
}
@conference {10_URSIUSA_Ruiz-CruzMontejo-GaraiRebollarEtAl_DesignandEvaluation,
	title = {Design and Evaluation of a Ka-band Antenna Feeder with Broadband Dual-Polarization Performance},
	booktitle = {Proc. 2010 USNC/URSI National Radio Science Meeting},
	year = {2010},
	month = {July},
	pages = {14},
	abstract = {New telecommunication satellite services have increased the demand on antenna feed systems with more stringent requirements in both the electrical and mechanical parts. In fact, one of the main goals for RF hardware onboard spacecrafts is the reduction of size and volume, at the expense of more complex design of the components. Thus, the use of a single antenna for several frequency bands is very common and the antenna feeder has to separate (or to combine, depending on the transmission/reception scheme) the different signals involved in the system. The frequency separation is carried out with multiplexers. Moreover, in many systems, dual polarization is used in order to have a more efficient use of the electromagnetic spectrum, using ortho-mode transducers (OMTs) for the polarization discrimination. In a very common scheme, the OMTs are attached by the common port to the antenna and by the other dedicated ports to the diplexers. This is the type of antenna feed network developed in this communication, for two Ka sub-bands centered in 21.7 and 28.7 GHz, respectively, with 4\% and 6\% fractional bandwidth, approximately. The developed OMT is based on a double symmetry junction (Boifot et al, "Simple and broadband orthomode transducer," IEE Proc. H Microw., Ant. and Prop., vol. 137, no. 6, pp. 396-400, Dec 1990.). In its simpler version, it has a metallic septum and full height vertical pins to match the vertical polarization. The effect of these pins will be studied. The routing network is another important part of the device, with a great impact on the size of the component and in the manufacturing method (see for instance Ruiz-Cruz et al. "Full-wave modeling and optimization of Boifot junction ortho-mode transducers," Int. J RFMiCAE, vol. 18, no. 4, pp. 303-313, July 2008). These different alternatives will be studied in the presentation. The diplexers are based on E-plane bifurcations with well-known low-pass and high-pass filters. The dimensions of the waveguides connecting the ortho-mode transducer and the waveguide diplexers are non-standard, in order to reduce the total feeder length, since transitions to standard waveguides are avoided. The diplexer is manufactured without any tuning element. Therefore, accurate CAD tools are required for the design, along with a precisely controlled fabrication.The design and evaluation of the different components will be addressed in the presentation, showing the experimental measurements, the expected simulated responses and the critical points found in the development of the antenna feeder.},
	author = {J A Ruiz-Cruz and Montejo-Garai, J R and Rebollar, J M and Mart{\i}n, M J and Garc{\'\i}a, V}
}
@conference {10_EIEC_RubioCorcoles_SintesisAnaliticaModosEsfericos,
	title = {S{\'\i}ntesis anal{\'\i}tica de agrupaciones planas basada en traslaci{\'o}n de modos esf{\'e}ricos},
	booktitle = {VII Iberian Meeting on Computational Electromagnetism (in Spanish)},
	year = {2010},
	month = {May},
	pages = {1},
	abstract = {Se presenta en este trabajo un m{\'e}todo anal{\'\i}tico de s{\'\i}ntesis de haz conformado en agrupaciones planas basado en la manipulaci{\'o}n de modos esf{\'e}ricos. Los teoremas de traslaci{\'o}n se utilizan para dos fines diferentes: relacionar los modos esf{\'e}ricos de cada elemento de la agrupaci{\'o}n con el fin de calcular los efectos de acoplamiento mutuo, y expresar el campo producido por cada elemento en t{\'e}rminos de modos esf{\'e}ricos de todo el conjunto para aplicar un procedimiento de s{\'\i}ntesis esf{\'e}rica basada en las propiedades ortogonales de los modos esf{\'e}ricos. Este m{\'e}todo de s{\'\i}ntesis de campo se basa en el hecho de que cualquier campo radiado de la antena puede expresarse como una serie discreta ponderada de funciones vectoriales esf{\'e}ricas y s{\'o}lo requiere el conocimiento a priori de la matriz de dispersi{\'o}n generalizada de cada elemento de la agrupaci{\'o}n considerado aislado del resto.},
	author = {Rubio, J and J C{\'o}rcoles and Gonz{\'a}lez, M A}
}
@conference {09_EuCAP_Corcoles,
	title = {Array design for different SLL and null directions with an interior-point optimization method from the generalized-scattering-matrix and spherical modes},
	booktitle = {Antennas and Propagation, 2009. EuCAP 2009. 3rd European Conference on},
	year = {2009},
	month = {March},
	pages = {1381-1385},
	abstract = {This paper presents a pattern synthesis technique for arbitrary planar arrays which can be characterized in terms of a generalized-scattering-matrix (GSM) and whose radiated field can be expressed as a spherical mode expansion (SME). The procedure yields the complex-valued excitations needed to achieve a pattern which fulfils the requirements of different sidelobe levels in different regions and several prescribed field nulls with a maximum directive gain. The formulation is based on matrix-valued functions which are computed from the GSM and the SME, so all interelement coupling effects coming from complex radiating structures used as array elements are inherently taken into account. To solve the resulting nonlinear optimization problem, a primal-dual interior-point filtering method specifically adapted to this formulation is developed. Numerical results are presented for arrays of microstrip patch antennas and dielectric resonator antennas.},
	keywords = {antenna pattern, antenna radiation patterns, antenna sidelobe level, dielectric resonator antenna, dielectric resonator antennas, electromagnetic coupling, Filtering, filtering theory, generalized scattering matrix, generalized-scattering-matrix, GSM, Hessian matrices, interelement coupling effect, interior-point optimization method, Jacobian matrices, microstrip antenna arrays, Microstrip antennas, microstrip patch antenna, Microstrip resonators, nonlinear optimization, optimisation, Optimization methods, pattern synthesis technique, planar antenna array, planar antenna arrays, Planar arrays, primal-dual interior-point filtering method, Resonator filters, S-matrix theory, spherical, spherical mode expansion, Transmission line matrix methods, wave expansion},
	url = {http://ieeexplore.ieee.org/stamp/stamp.jsp?tp=\&arnumber=5067872},
	author = {J C{\'o}rcoles and Gonz{\'a}lez, M A and Rubio, J and Zapata, J}
}
@article {9_DualPolarizerPIER,
	title = {Dual Linear/Circular Polarized Plannar Antenna with Low Profile Double-Layer Polarizer of 45{\textpm} Tilted Metallic Strips for WIMAX Applications},
	journal = {PIER - Progress in Electromagnetics Research},
	volume = {98},
	year = {2009},
	month = {Oct.},
	pages = {221-231},
	abstract = {A low profile double-layer polarizer structure is presented for planar patch antennas to obtain circular polarization in 3.5 GHz WiMAX band (3.4-3.6 GHz?5.7\% bandwidth). Each polarizer layer is composed of 45{\textordmasculine} tilted metallic strips on a printed circuit. A bandwidth widening is obtained due to a significant reduction of the distance between polarizer and patches. The associated effects from the interaction of the two structures have been studied. A 2x2 array prototype has been implemented and measured, with a 8\% average bandwidth in reflection and dual linear/circular polarization.},
	issn = {1559-8985},
	doi = {10.2528/PIER09092406},
	url = {http://www.jpier.org/PIER/pier98/13.09092406.pdf},
	author = {J L Masa-Campos and Gonz{\'a}lez-Fern{\'a}ndez, F}
}
@article {09_TAP_Corcoles_FourierSynthesis,
	title = {Fourier Synthesis of Linear Arrays Based on the Generalized Scattering Matrix and Spherical Modes},
	journal = {IEEE Transactions on Antennas and Propagation},
	volume = {57},
	number = {7},
	year = {2009},
	month = {July},
	pages = {1944-1951},
	abstract = {This paper presents a novel, simple pattern synthesis procedure for linear equispaced arrays which can be characterized by a generalized scattering matrix (GSM) and whose radiated field can be expressed as a weighted sum of shifted spherical waves. It can be viewed as an extension of the classic design techniques of the Fourier series (FS) method or the Woodward-Lawson frequency sampling method, to the case in which the individual antenna elements{\textquoteright} patterns and all interelement couplings are taken into account. The design procedure, which yields the excitations needed to achieve the desired pattern, is based on either the FS or the discrete Fourier transform (DFT) of the spherical mode expansion of the array radiated field, as well as on various properties associated to the FS or DFT coefficients. In this work, to compute the GSM of the array and the spherical mode expansion of the field, a validated hybrid full-wave methodology, based on the finite element method and rotation and translation properties of spherical waves, is used. Numerical results of different synthesized array patterns are presented for different arrays made up of dielectric resonator antennas and cavity-backed microstrip circular patches.},
	keywords = {Antenna array mutual coupling, cavity-backed microstrip circular patches, dielectric resonator antennas, discrete Fourier transform, discrete Fourier transforms, discrete Fourier transforms (DFT), finite element analysis, finite element method, finite element methods, Fourier series, Fourier synthesis, Frequency, generalized scattering matrix, GSM, interelement couplings, linear antenna arrays, linear arrays, linear equispaced arrays, microstrip antenna arrays, Microstrip antennas, pattern synthesis, S-matrix theory, Sampling methods, Scattering, scattering matrices, shifted spherical waves, signal sampling, spherical mode expansion, spherical modes, Transmission line matrix methods, Woodward-Lawson frequency sampling},
	issn = {0018-926X},
	doi = {10.1109/TAP.2009.2021929},
	url = {http://ieeexplore.ieee.org/stamp/stamp.jsp?tp=\&arnumber=4907114},
	author = {J C{\'o}rcoles and Gonz{\'a}lez, M A and Rubio, J}
}
@conference {09_IMS_MongeRuiz-CruzAnzaEtAl_HighPowerDualMode,
	title = {High Power analysis and design of dual-mode channel filters},
	booktitle = {2009 IEEE MTT-S International Microwave Symposium Digest},
	year = {2009},
	month = {June},
	pages = {1353-1356},
	abstract = {In this paper, we present two dual-mode channel filter topologies which are able to withstand more than 600 W in Ku-Band. The two different designs (one with elliptical cavities and the other one with rectangular cavities) implement the same transfer function: four order, elliptical response centered in 12GHz, with 40MHz bandwidth and two transmission zeros. It is shown that the critical dimensions for the power-handling of these filters are the dimensions of the input-output irises. In fact, in order to rigorously obtain these conclusions and to reach these high-power levels (including margins), it is essential to use the advanced numerical techniques described in the paper to predict the multipactor effect. Moreover, the standard approach for multipactor onset prediction based on computing the voltage inside the component is shown to be too conservative and difficult to apply to many practical filter configurations.},
	issn = {0149-645X},
	doi = {0.1109/MWSYM.2009.5165956},
	url = {http://ieeexplore.ieee.org/stamp/stamp.jsp?tp=\&arnumber=5165956\&isnumber=5165586},
	author = {Monge, J and J A Ruiz-Cruz and Anza, S and Vicente, C and Zaki, K A and Montejo-Garai, J R and Rebollar, J M and Gil, J and Gimeno, B., and Boria, V E}
}
@article {09_ELL_Corcoles_LPfromGSM,
	title = {Linear programming from generalised scattering matrix analysis of array for minimum sidelobe level and prescribed nulls},
	journal = {Electronics Letters},
	volume = {45},
	number = {1},
	year = {2009},
	month = {January},
	pages = {9-10},
	abstract = {A pattern synthesis technique for arbitrary planar arrays which are characterised in terms of a generalised scattering matrix and whose radiated field is expressed as a spherical mode expansion is introduced. The procedure yields the complex-valued excitations to achieve a minimum-maximum sidelobe level given a specified pointing direction and mainlobe width, as well as prescribed field nulls. All inter-element coupling effects coming from complex radiating structures used as array elements are inherently taken into account. Numerical results are presented for arrays of dielectric resonator antennas.},
	keywords = {Antenna arrays, arbitrary planar arrays, complex-valued excitations, dielectric resonator antennas, dielectric resonators, electromagnetic coupling, electromagnetic wave scattering, generalised scattering matrix analysis, inter-element coupling effects, linear programming, minimum sidelobe level array, minimum-maximum sidelobe level, pattern synthesis technique, prescribed nulls},
	issn = {0013-5194},
	doi = {10.1049/el:20092008},
	url = {http://ieeexplore.ieee.org/stamp/stamp.jsp?tp=\&arnumber=4733076},
	author = {J C{\'o}rcoles and Gonz{\'a}lez, M A and Zapata, J}
}
@article {09_ELL_Corcoles_ModellingLOScoupledMIMO,
	title = {Modelling line-of-sight coupled MIMO systems with generalised scattering matrices and spherical wave translations},
	journal = {Electronics Letters},
	volume = {45},
	number = {12},
	year = {2009},
	month = {June},
	pages = {598-599},
	abstract = {A model to rigorously characterise line-of-sight MIMO systems is introduced. It is based on the generalised scattering matrix of each antenna, considered as isolated, and the rotation and translation coefficients of spherical modes. The resulting channel matrix rigorously includes the exact spherical vector nature of electromagnetic propagation (which may exert a significant influence over short-range links), mutual coupling effects and real antenna reflection, transmission, reception and scattering features. Numerical results are presented for MIMO systems made up of ideal dipoles.},
	keywords = {antenna reflection, channel matrix, electromagnetic coupling, electromagnetic propagation, electromagnetic wave propagation, generalised scattering matrix, line-of-sight coupled MIMO system, MIMO communication, multiple-input multiple-output system, mutual coupling effect, S-matrix theory, spherical wave translation scheme},
	issn = {0013-5194},
	doi = {10.1049/el.2009.0545},
	url = {http://ieeexplore.ieee.org/stamp/stamp.jsp?tp=\&arnumber=5069759},
	author = {J C{\'o}rcoles and Pontes, J and Gonz{\'a}lez, M A and Zwick, T}
}
@conference {09_APS_Corcoles_MultibeamLP,
	title = {Multibeam synthesis with minimum SLL through linear programming from the GSM-analysis of an array},
	booktitle = {Antennas and Propagation Society International Symposium, 2009. APSURSI {\textquoteright}09. IEEE},
	year = {2009},
	month = {June},
	pages = {1-4},
	abstract = {The application of all sort of optimization techniques to different array pattern synthesis problems has been widely studied since the early days of antenna array design. Most of these works (generally having constraints on the array configuration) take for granted several assumptions, among which one can highlight considering isotropic sources and not taking into account coupling between array elements. Great advances have been achieved in the field of computational electromagnetics which allow complex radiating structures, including finite antenna arrays, to be analyzed from a full-wave approach inherently taking into account all electromagnetic effects. Recently, new techniques for the afore-mentioned pattern synthesis problems with the inclusion of this rigourous electromagentic (EM) analysis have been developed. In this work, the authors propose an EM-based design technique which yields the excitations of an arbitraty planar array to output a field pattern with minimum maximum sidelobe level (SLL) given the directions of various main beams with specified mainlobe widths and different relative amplitudes and phase differences. The array is characterized through a generalized scattering matrix (GSM) and its radiated field is expressed as a spherical mode expansion (SME). The accurate determination of the array GSM is needed to have it rigourously characterized, so the use of a full-wave technique is required in case complex antenna elements or arbitrary array configurations are considered. We develop the formulation to arrive at a standard linear programming (LP) problem. Numerical results of a linear array of dielectric resonator antennas (DRA{\textquoteright}s) are presented.},
	keywords = {Antenna arrays, array pattern synthesis, complex radiating structures, computational electromagnetics, Design optimization, dielectric resonator antennas, electromagentic analysis, Electromagnetic analysis, electromagnetic fields, Electromagnetic radiation, electromagnetic waves, generalized scattering matrix, GSM, linear antenna arrays, linear programming, minimum maximum sidelobe level, multibeam antennas, multibeam synthesis, optimization, S-matrix theory, SME, spherical mode expansion},
	issn = {1522-3965},
	doi = {10.1109/APS.2009.5171513},
	url = {http://ieeexplore.ieee.org/stamp/stamp.jsp?tp=\&arnumber=5171513},
	author = {J C{\'o}rcoles and Gonz{\'a}lez, M A}
}
@article {09_TAP_Corcoles_MultiobjectiveOptimization,
	title = {Multiobjective Optimization of Real and Coupled Antenna Array Excitations via Primal-Dual, Interior Point Filter Method From Spherical Mode Expansions},
	journal = {IEEE Transactions on Antennas and Propagation},
	volume = {57},
	number = {1},
	year = {2009},
	month = {Jan},
	pages = {110-121},
	keywords = {antenna array, Antenna arrays, Apertures, dielectric resonator antennas, Filters, generalized scattering matrix, Hessian matrices, Jacobian matrices, Lighting, matrix-valued functions, maximum crosspolar level, microstrip antenna arrays, Microstrip antennas, microstrip patch array, minimum aperture illumination efficiency, multiobjective optimization, optimisation, Optimization methods, planar antenna arrays, planar array excitations, Planar arrays, primal-dual interior point method, spherical mode expansions, spherical wave expansion, Transmission line matrix methods},
	issn = {0018-926X},
	doi = {10.1109/TAP.2008.2009727},
	url = {http://ieeexplore.ieee.org/stamp/stamp.jsp?tp=\&arnumber=4797974},
	author = {J C{\'o}rcoles and Gonz{\'a}lez, M A and Rubio, J}
}
@article {09_AWPL_Corcoles_MutualCouplingCompensation,
	title = {Mutual Coupling Compensation in Arrays Using a Spherical Wave Expansion of the Radiated Field},
	journal = {IEEE Antennas and Wireless Propagation Letters},
	volume = {8},
	year = {2009},
	pages = {108-111},
	abstract = {This letter presents a flexible method to compensate the interelement mutual coupling (MC) effects that may degrade the field pattern of an array of real and coupled antennas. A closed-expression for a mutual coupling compensation matrix (MCCM) is derived. The MCCM is used to compensate the presence of the real individual elements{\textquoteright} patterns and the interelement MC effects for any excitations obtained with an isotropic-based pattern synthesis method. The MCCM is calculated from the generalized scattering matrix (GSM) of an antenna array and the spherical mode expansion (SME) of its radiated field. For a given array, this MCCM has to be calculated only once since it only depends on the radiating and scattering characteristics of the antenna elements as well as on their location in the array. Conditions regarding null field pattern directions can also be reinforced in the MCCM. To compute the GSM of the array and the SME of the radiated field, a validated full-wave hybrid and modular methodology is used. Numerical results of synthesized patterns where the MC effects have been compensated are presented for arrays made up of dielectric resonator antennas.},
	keywords = {antenna array, Antenna array mutual coupling, Antenna arrays, antenna radiation patterns, dielectric resonator antennas, electromagnetic coupling, field pattern, field radiation, generalized scattering matrix, interelement mutual coupling effect, isotropic-based pattern synthesis method, modular methodology, mutual coupling compensation matrix, Planar arrays, quadratic programming, S-matrix theory, scattering matrices, spherical wave expansion},
	issn = {1536-1225},
	doi = {10.1109/LAWP.2008.2012276},
	url = {http://ieeexplore.ieee.org/stamp/stamp.jsp?tp=\&arnumber=4745777},
	author = {J C{\'o}rcoles and Gonz{\'a}lez, M A and Rubio, J}
}
@article {09_IntJRFMiCAE_CORCOLES_PerformanceUslot,
	title = {Performance characterization of wideband, wide-angle scan arrays of cavity-backed U-slot microstrip patch antennas},
	journal = {International Journal of RF and Microwave Computer-Aided Engineering},
	volume = {19},
	number = {3},
	year = {2009},
	pages = {389{\textendash}396},
	abstract = {This work looks at the use of wideband cavity-backed U-slot microstrip antennas in finite phased arrays. This configuration retains the single-patch and single-layer characteristics of conventional microstrip antenna arrays and provides a good impedance matching over wider scan angles when electrically thick substrates are used to improve the frequency bandwidth. The characteristics of finite phased arrays of U-slot rectangular microstrip patches enclosed in cylindrical cavities are analyzed from a validated hybrid methodology based on the finite element method, the modal analysis, and the properties of spherical waves. The results are compared with those obtained using an infinite array model. {\textcopyright} 2008 Wiley Periodicals, Inc. Int J RF and Microwave CAE, 2009.},
	keywords = {broadband U-slot patch antenna, cavity-backed microstrip antennas, finite element method, finite phased array, spherical mode expansion},
	issn = {1099-047X},
	doi = {10.1002/mmce.20361},
	url = {http://dx.doi.org/10.1002/mmce.20361},
	author = {J C{\'o}rcoles and Gonz{\'a}lez, M A and Rubio, J and Zapata, J}
}
@conference {09_URSIESP_Corcoles_SintesisdeFourier,
	title = {S{\'\i}ntesis de Fourier para agrupaciones lineales de antenas reales y acopladas},
	booktitle = {Proc. 2009 Simposium Nacional URSI (in Spanish)},
	year = {2009},
	month = {Sep},
	pages = {1-4},
	abstract = {This work presents a novel and simple pattern synthesis procedure for lineal and equispaced arrays that considers real individual antenna elements{\textquoteright} patterns and includes the mutual coupling between elements. It is an extension of the classic design techniques of the Fourier series method or the Woodward-Lawson frequency sampling method based on the expansion of the radiated field of the individual array elements in spherical modes, and the characterization of the whole array from a generalized scattering matrix},
	author = {J C{\'o}rcoles and Gonz{\'a}lez, M A and Rubio, J}
}
@article {08_MOPT_CORCOLES_CADstackedpatches,
	title = {Cad of stacked patch antennas through multipurpose admittance matrices from FEM and neural networks},
	journal = {Microwave and Optical Technology Letters},
	volume = {50},
	number = {9},
	year = {2008},
	month = {Sep},
	pages = {2411-2416},
	abstract = {In this work, a novel computer-aided design methodology for probe-fed, cavity-backed, stacked microstrip patch antennas is proposed. The methodology incorporates the rigor of a numerical technique, such as finite element methods, which, in turn, makes use of a newly developed procedure (multipurpose admittance matrices) to carry out a full-wave analysis in a given structure in spite of certain physical shapes and dimensions not yet being established. With the aid of this technique, we form a training set for a neural network, whose output is the desired response of the antenna according to the value of design parameters. Last, taking advantage of this neural network, we perform a global optimization through a genetic algorithm or simulated annealing to obtain a final design. The proposed methodology is validated through a real design whose numerical results are compared with measurements with good agreement.},
	keywords = {computer-aided design, finite element methods, neural networks, optimization algorithms, stacked microstrip antennas},
	issn = {1098-2760},
	doi = {10.1002/mop.23670},
	url = {http://onlinelibrary.wiley.com/doi/10.1002/mop.23670/abstract},
	author = {J C{\'o}rcoles and Gonz{\'a}lez, M A and Zapata, J}
}
@conference {08_URSIESP_Corcoles_DisenoAutomatizadoParches,
	title = {Dise{\~n}o automatizado de antenas de parches apilados en cavidad mediante descomposici{\'o}n de dominio en el MEF, redes neuronales y optimizaci{\'o}n global},
	booktitle = {Proc. 2008 Simposium Nacional URSI (in Spanish)},
	year = {2008},
	month = {Sep},
	pages = {1-4},
	abstract = {This work reports the development of a computeraided- design methodology consisting of three steps for probe-fed cavity-backed, stacked microstrip patch antennas. In the first step, the rigour of a numerical technique such as the finite element method (FEM) to describe the electromagnetic behaviour of these structures is incorporated. The application of the FEM is carried out on a highly efficient basis through a sophisticated domain decomposition approach. From these results, a neural network (NN) is trained to output the desired response of the antenna according to the value of design parameters. Thanks to the versatily of this NN, a global optimization through simulated annealing or genetic algorithms is lastly executed to obtain a final design. The proposed methodology is validated through a real design whose numerical results are compared with measurements with good agreement.},
	author = {J C{\'o}rcoles and Gonz{\'a}lez, M A and Zapata, J}
}
@conference {08_URSIESP_Gonzalez-Fernandez_Disenodeantenas,
	title = {Dise{\~n}o de antenas impresas de banda ancha con polarizador para sistemas WiMAX a 3.5GHz y comunicaciones por sat{\'e}lite en banda {\^a}{\texteuro}\~{}X{\^a}{\texteuro}{\texttrademark}},
	booktitle = {Proc. 2008 Simposium Nacional URSI (in Spanish)},
	year = {2008},
	month = {Sept.},
	pages = {1-4},
	abstract = {Mobile communications terminals are strongly affected by multi-path reflection waves, so phase error can be quite important in this case. Circular polarization (CP) is used to avoid this problem, mainly caused by reflection on buildings and ground surface. The proposed antenna with parasitic strip elements as polarizer has the advantage to be robust, low cost and easy to fabricate with conventional materials and printed circuit technology. Two prototypes are exposed, WiMAX and X band, whose measures results verify the CP and show that good return loss and axial ratio characteristics have been obtained.},
	url = {http://w3.iec.csic.es/ursi/paginas/index_congresosreali.htm},
	author = {Gonz{\'a}lez-Fern{\'a}ndez, F and J L Masa-Campos and Castro, M T and J A Ruiz-Cruz}
}
@conference {08_EIEC_CorcolesetAl_OptimizationIPM,
	title = {Optimization of coupled antenna arrays characterized by spherical modes by means of an interior-point filtering method},
	booktitle = {VI Iberian Meeting on Computational Electromagnetism},
	year = {2008},
	month = {Oct},
	pages = {1},
	abstract = {In this work, we present a novel method for the efficient optimization of arbitrary planar array excitations. This method, which inherently takes into account every array element pattern as well as all interelement couplings, allows the maximization of the directive or power gain of an arbitrary planar array scanned at whichever direction, subject to constraints on the maximum sidelobe level, the maximum crosspolar level, the minimum aperture illumination efficiency, the setting of null pointing directions or a dynamic range ratio control. Numerical examples of arrays with canonical geometries, composed of microstrip patches or dielectric resonator antennas and covering a wide variety of requirements are presented.},
	author = {J C{\'o}rcoles and Gonz{\'a}lez, M A and Rubio, J and Zapata, J}
}
@conference {05_URSIUSA_Ruiz-CruzGentiliRebollar_Analysisofwaveguide,
	title = {Analysis of waveguide junctions by the Boundary Contour Mode-Matching Method with segmented regions},
	booktitle = {Proc. 2005 USNC/URSI National Radio Science Meeting},
	year = {2005},
	month = {July},
	pages = {1},
	abstract = {The Boundary Contour Mode-Matching method (BCMM) allows the analysis of homogeneous waveguide junctions. The basic building block of this method is an E- or H-plane structure with arbitrary contour, excited by several rectangular waveguides (the ports). The electromagnetic field inside the junction is expanded in basic solutions of the Maxwell equations as, for instance, circular waves (J.M Reiter et al., IEEE TMTT, 796-801, April 1995). In the ports, a modal series is used. The boundary conditions are imposed by means of a Galerkin method that relates the two different field expansions and leads to the Generalized Scattering Matrix (GSM) of the junction. Different improvements have been made to the method as (R. H MacPhie et al., IEEE TMTT, 232-237, Feb. 1999) and (J A Ruiz-Cruz et. al, IEE Microw. Ant. and Prop., 332-338, Oct. 2003), oriented to speed up the computation of the Galerkin method matrices. The technique has been successfully applied to different types of structures as arbitrary bends (circular, mitered,..), cavities with rounded corners and Y-junctions. In comparison with other quasi-analytical methods, this technique does not require to characterize the eigenfunctions of the junction. However, when ridged zones appear in the contour of the problem (for instance a bend with a matching element), the BCMM linear system is not well conditioned and convergent results are difficult to achieve. The aim of this contribution is to overcome the limitations of the ridged zones by means of segmenting the junction under analysis in regions which can be successfully analyzed by the BCMM. The trivial case is when the problem can be divided in two or more basic building blocks linked by waveguide ports, which can be solved by cascading the GSM of each separate block. This contribution will focus on structures, like a T-junction with an inner ridge zone, where the trivial case can not be applied and the segmented regions must be considered all together in the field-matching procedure. The formulation will use three type of expansions: a) a dedicated expansion for representing the electromagnetic field in each segmented region, b) the modal series in the ports, c) a series to describe the electric field at the interface between regions. All the amplitudes of the expansions are linked by the boundary conditions at the interfaces. A Galerkin method will provide the GSM of the junction. The results of the investigated problems will be shown in the oral presentation.},
	author = {J A Ruiz-Cruz and Gentili, G G and Rebollar, J M}
}
