@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 {Polo-Lopez20208203,
	title = {Modal Field Synthesis of Monopulse Difference Patterns for Radiating Aperture},
	journal = {IEEE Transactions on Antennas and Propagation},
	volume = {68},
	number = {12},
	year = {2020},
	note = {cited By 0},
	pages = {8203-8208},
	doi = {10.1109/TAP.2020.2997477},
	url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85098141132\&doi=10.1109\%2fTAP.2020.2997477\&partnerID=40\&md5=382b64c436a29c18c5bb3a1eb34aca2a},
	author = {Polo-Lopez, L. and J C{\'o}rcoles and Ruiz-Cruz, J.A.}
}
@article {15_TAP_RubioIzqdoCorcoles_ModalNetworkMIMO,
	title = {Mutual Coupling Compensation Matrices for Transmitting and Receiving Arrays},
	journal = {IEEE Transactions on Antennas and Propagation},
	volume = {63},
	number = {2},
	year = {2015},
	month = {Feb},
	pages = {839-843},
	abstract = {A general method to obtain a matrix which allows the compensation of mutual coupling effects in transmitting arrays for the total field in all directions is introduced. This method is independent of the numerical method used in the analysis and it can include the effect of the antenna platform. The starting point can be the active element patterns or the spherical mode expansion from spherical near-field antenna measurements. Additionally, the spherical mode expansion is also used to find a matrix which allows the compensation of mutual coupling effects in receiving arrays. Through this theory, a simple relation between the compensation matrices of the transmitting and the receiving arrays is found. As a consequence, the scattering matrix of a circuit that allows the simultaneous compensation of mutual coupling effects for the transmission and the reception problem can be easily defined. Finally, it will be shown how the capabilities of the compensation in all directions depend strongly on the array element.},
	keywords = {Active element pattern, antenna array, Antenna arrays, Antenna measurements, antenna radiation patterns, finite element analysis, Mutual coupling, mutual coupling compensation, spherical mode expansion, transmitting antennas, Vectors},
	issn = {0018-926X},
	doi = {10.1109/TAP.2014.2382691},
	url = {http://ieeexplore.ieee.org/stamp/stamp.jsp?tp=\&arnumber=6987253},
	author = {Rubio, J and Izquierdo, J F and J C{\'o}rcoles}
}
@conference {14_URSIESP_Corcoles_SintesisdeFourier,
	title = {Matriz de compensaci{\'o}n de acoplos mutuos para agrupaciones de antenas en problemas de radiaci{\'o}n},
	booktitle = {Proc. 2014 Simposium Nacional URSI (in Spanish)},
	year = {2014},
	month = {Sep},
	pages = {1-4},
	abstract = {In this work, a general method to obtain a matrix which allows compensating the mutual coupling effects in arrays for the total field in all directions is introduced. This method is independent of the numerical method used in the analysis and it can include the effect of the antenna platform. The starting point can be the active element patterns or spherical near-field antenna measurements. It will be shown how the capabilities of compensation depend strongly on the array element.},
	author = {Rubio, J and Izquierdo, J F and J C{\'o}rcoles}
}
@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 {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}
}
