@article {Lu2020,
	title = {Enhanced FEM-based DBIM approach for two-dimensional microwave imaging},
	journal = {IEEE Transactions on Antennas and Propagation},
	year = {2020},
	note = {cited By 0},
	doi = {10.1109/TAP.2020.3044806},
	url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85098778567\&doi=10.1109\%2fTAP.2020.3044806\&partnerID=40\&md5=e274ac8195bb72d04eb8ea16b791dcce},
	author = {Lu, P. and J C{\'o}rcoles and Kosmas, P.}
}
@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 {moran2017efficient,
	title = {Efficient computation and orthonormalization of multiple TEM numerical modes arising from FEM for microwave computer-aided-design},
	booktitle = {Numerical Electromagnetic and Multiphysics Modeling and Optimization for RF, Microwave, and Terahertz Applications (NEMO), 2017 IEEE MTT-S International Conference on},
	year = {2017},
	pages = {197{\textendash}199},
	publisher = {IEEE},
	organization = {IEEE},
	author = {Mor{\'a}n-L{\'o}pez, Ana and J C{\'o}rcoles and Ruiz-Cruz, Jorge A}
}
@article {corcoles2017estimation,
	title = {On the estimation of the worst-case implant-induced RF-heating in multi-channel MRI},
	journal = {Physics in Medicine and Biology},
	volume = {62},
	number = {12},
	year = {2017},
	pages = {4711},
	publisher = {IOP Publishing},
	author = {J C{\'o}rcoles and Zastrow, Earl and Kuster, Niels}
}
@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 {moran2016electromagnetic,
	title = {Electromagnetic Scattering at the Waveguide Step between Equilateral Triangular Waveguides},
	journal = {Advances in Mathematical Physics},
	volume = {2016},
	year = {2016},
	publisher = {Hindawi Publishing Corporation},
	author = {Mor{\'a}n-L{\'o}pez, Ana and J C{\'o}rcoles and Ruiz-Cruz, Jorge A and Montejo-Garai, Jos{\'e} R and Rebollar, Jes{\'u}s M}
}
@conference {15_EIEC_Corcoles_mutualcoupling,
	title = {EM field combination and optimization for RF shimming and SAR control in Magnetic Resonance transmit array systems},
	booktitle = {X Iberian Meeting on Computational Electromagnetism},
	year = {2015},
	month = {May},
	author = {J C{\'o}rcoles and E Zastrow}
}
@conference {13_URSIUSA_Leal-SevillanoRuiz-CruzMontejo-GaraiEtAl_EquivalentcircuitofMultiaperture,
	title = {Equivalent circuit of multi-aperture waveguide irises and its application in the design of compact filters},
	booktitle = {Proc. 2013 USNC/URSI National Radio Science Meeting},
	year = {2013},
	month = {July},
	pages = {11},
	abstract = {Equivalent circuits of waveguide discontinuities and volumes were use in the past for the design of microwave devices, N Marcuvitz, "Waveguide Handbook". Nowadays, most of this waveguide structures can be analyzed and optimized using rigorous full-wave methods (either numerical or quasi-analytical) with acceptable computation times. Nevertheless, an accurate equivalent circuit provides physical insight of the structure. This additional electromagnetic knowledge might lead to the design of new high-performance waveguide components. Moreover, non-ideal behaviors commonly obtained in experimental measurements, such as narrow band spike resonances, can be explained by means of accurate equivalent circuits. This work is divided in two parts: first an accurate and wide-band equivalent circuit of multi-aperture waveguide irises is determined; then this equivalent circuit is applied in the synthesis of compact waveguide filters, including pseudo-elliptical band-pass, dual band and stop-band filters. The proposed equivalent circuit of multi-aperture irises (with an arbitrary number of apertures) is based on an in deep electromagnetic analysis of the possible resonances of these structures. Two different kind of resonances are possible, either implementing a refection zero (resonances) or a transmission zero (antiresonances). The equivalent circuit is a parallel admittance with a circuit topology given by any of the classical one-port LC realizations, G C Temes and J. W. LaPatra, "Introduction to Circuit Synthesis and Design". The values of the circuit elements are entirely determined by the singular points (resonances and antiresonances) obtained in the full-wave analysis. Modeling of different multi-aperture waveguide irises by means of the proposed equivalent circuit, including experimental results of a five apertures iris, will be addressed in the presentation. Some designs of waveguide filters using the particular case of two-fold symmetric irises with three apertures will be presented. The design discussion will be focused on a systematic synthesis method based on the accurate modeling of the waveguide irises.},
	author = {C A Leal-Sevillano and J A Ruiz-Cruz and Montejo-Garai, J R and J A Ruiz-Cruz and Rebollar, J M}
}
@article {13_JEMWA_Leal-SevillanoMontejo-GaraiRuiz-CruzEtAl_ExperimentalcomparisonofWBandFilters,
	title = {Experimental comparison of waveguide filters at W-band implemented by different machining processes and split-block},
	journal = {Journal of Electromagnetic Waves and Applications},
	volume = {27},
	number = {18},
	year = {2013},
	month = {Oct},
	pages = {2390-2394},
	abstract = {The aim of this work is to explore different machining processes and different split-block, getting important experimental information for the design of passive waveguide components at W-band. To this end, two all-pole response filters are machined by different techniques: electro-discharge and milling, and split-block: H-plane and E-plane. Some interesting results, obtained in the design, fabrication, and measure of waveguide filters at W-band, such as tolerances of the different processes and level of insertion loss, are reported.},
	keywords = {antena de parche, microstrip, ranura, red de alimentaci{\'o}n},
	issn = {0920-5071},
	doi = {http://dx.doi.org/10.1080/09205071.2013.851011},
	author = {C A Leal-Sevillano and Montejo-Garai, J R, and J A Ruiz-Cruz and Rebollar, J M}
}
@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 {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}
}
@conference {10_PIERSym_Ruiz-CruzCrespo-ValeroMosig_EfficientCADMultiCoupled,
	title = {Efficient Computer Aided Design of Compact Multi-Coupled Stripline Resonators Filters},
	booktitle = {Proc. 2010 Progress in Electromagnetic Research Symposium (PIERS)},
	year = {2010},
	month = {March},
	pages = {1},
	author = {J A Ruiz-Cruz and Crespo-Valero, P and Mosig, J R}
}
@article {10_ELMG_Montejo-GaraiRuiz-CruzRebollar_EfficientOMUXSingleTerminated,
	title = {Efficient Design of Contiguous-Band Elliptic-Response Manifold Output Multiplexers with Single-Terminated Filters},
	journal = {Electromagnetics},
	volume = {30},
	number = {8},
	year = {2010},
	note = {falta pos en JCR de su a{\~n}o},
	month = {November},
	pages = {644-659},
	abstract = {A procedure for the synthesis and design of contiguous-band manifold output multiplexers based on singly terminated filters with an elliptic response is presented. An extension of the Cauer ladder development using the zero-shifting technique leads to the synthesis of a driving-point impedance, including transmission zeros at finite real frequencies. The synthesized canonical forms have different topologies, number of reactive constant elements, and reactive part of the driving impedance, which have been compared to find the most suitable combination in the multiplexing process to match the channels to the manifold. The study proposed here is very important for improving the design process, and it is illustrated with four different multiplexer configurations and implemented with different pole-extraction orders in the ladder singly terminated filters. The multiplexer design has been divided into tasks with low computational effort extensively using the circuit model. Thus, the final full-wave optimization is significantly reduced, since the starting point is closer to the required specification. Finally, a Ku-band four-channel elliptic-response multiplexer has been designed in the H-plane rectangular waveguide, manufactured and measured in order to show the proposed approach.},
	keywords = {H-plane, mode matching, transmission zero},
	issn = {0272-6343},
	doi = {10.1080/02726343.2010.524879},
	url = {http://www.informaworld.com/smpp/content~db=all?content=10.1080/02726343.2010.524879},
	author = {Montejo-Garai, J R and J A Ruiz-Cruz and Rebollar, J M}
}
@article {09_APL_Medina-MenaRuiz-CruzMesa-LedesmaEtAl_ExpEOTNoPlasmons,
	title = {Experimental verification of extraordinary transmission without surface plasmons},
	journal = {Applied Physics Letters},
	volume = {95},
	number = {7},
	year = {2009},
	month = {August},
	pages = {1-3},
	abstract = {This letter provides an experimental demonstration of extraordinary transmission in a closed waveguide system loaded with an electrically small diaphragm. This is a situation where the standard surface plasmon polariton (SPP) theory does not apply. The theoretical explanation is then based on the concept of impedance matching. This concept has previously been applied by some of the authors to account for enhanced transmission in situations where surface plasmon theory can be used: periodic arrays of small holes or slits in flat metal screens. The experiment in this letter supports the impedance matching model, valid for when SPPs are present or not},
	keywords = {impedance matching, light transmission, optical waveguides, periodic structures, polaritons, surface electromagnetic waves, surface plasmons},
	issn = {0003-6951},
	doi = {10.1063/1.3206738},
	url = {http://apl.aip.org/getpdf/servlet/GetPDFServlet?filetype=pdf\&id=APPLAB000095000007071102000001\&idtype=cvips},
	author = {Medina-Mena, F and J A Ruiz-Cruz and Mesa-Ledesma, F and Montejo-Garai, J R and Rebollar, J M and Marques-Sillero, R}
}
@article {08_IJRFMiCAE_FahmiRuiz-CruzZaki_EandH-plane,
	title = {E and H-plane wide-band ridge waveguide couplers},
	journal = {International Journal of RF and Microwave Computer-Aided Engineering},
	volume = {18},
	number = {4},
	year = {2008},
	month = {July},
	pages = {348-358},
	abstract = {A systematic synthesis procedure for ridge waveguide branch line couplers in both E-plane and H-plane configurations is presented. Ridge waveguides are chosen to benefit from their wide mono-mode band and compact size compared to rectangular waveguides. Equivalent circuit parameters are used to synthesize the coupler sections. Rigorous mode matching method is used for full-wave analysis and optimization of the couplers. Ridge couplers both in empty waveguide and Low Temperature Co-fired Ceramic "LTCC" technology are designed using the proposed method and the design is verified with another numerical method. A prototype is built and its response is measured to verify the approach},
	keywords = {full-wave, LTCC, mode matching, optimization, ridge waveguide},
	issn = {1096-4290},
	doi = {10.1002/mmce.20293},
	url = {http://www3.interscience.wiley.com/cgi-bin/fulltext/119140987/PDFSTART},
	author = {Fahmi, M M and J A Ruiz-Cruz and Zaki, K A}
}
@article {05_IJRFMiCAE_Ruiz-CruzRebollar_Eigenmodesofwaveguides,
	title = {Eigenmodes of waveguides using a boundary contour mode-matching method with an FFT scheme},
	journal = {International Journal of RF and Microwave Computer-Aided Engineering},
	volume = {15},
	number = {3},
	year = {2005},
	month = {May},
	pages = {286-295},
	abstract = {An efficient boundary contour mode-matching method (BCMM) is applied to the analysis of hollow waveguides whose cross section is enclosed by curved and planar boundaries. The TE and TM modes are expressed in terms of circular waves whose cutoff wavenumber and amplitudes are the unknowns of the problem.. The boundary conditions are imposed with a new line-integral extended over the closed contour. The weighting functions introduced and the use of the transformations between plane and circular waves avoid the conventional numerical integrations. In addition, the conversion between the different field representations is accelerated due to the use of the fast Fourier transform (FFT). Finally, the numerical results are shown as a comparison of our approach with other numerical methods},
	keywords = {boundary contour mode-matching method, eigenmodes, FFT},
	issn = {1096-4290},
	doi = {10.1002/mmce.20082},
	url = {http://www3.interscience.wiley.com/cgi-bin/fulltext/110429941/PDFSTART},
	author = {J A Ruiz-Cruz and Rebollar, J M}
}
@article {1_CouplingmodelMOTL,
	title = {Estimation of the patch-array-coupling model through radiated-field measurements},
	journal = {Microwave and Optical Technology Letters},
	volume = {43},
	number = {1},
	year = {2004},
	month = {Oct.},
	pages = {59-65},
	abstract = {In the design process of array antennas, coupling is one of the most important elements to be considered. The real feeding-radiated coefficients can be quite different from the theoretical ones because of this effect. In this paper, a characterization method is presented that allows each element to be matched from the array. All the parameters of the array-coupling model are obtained through the measurement of scattering parameters and radiation patterns. Two practical applications for a linear patch array are presented.},
	keywords = {array, coupling, patch antenna, planar antenna},
	issn = {0895-2477},
	doi = {10.1002/mop.20375},
	url = {http://onlinelibrary.wiley.com/doi/10.1002/mop.20375/abstract},
	author = {Fern{\'a}ndez, J M and J L Masa-Campos and Sierra-Casta{\~n}er, M and Castellanos, D and Sierra-P{\'e}rez, M}
}
@conference {04_IMS_LiuRuiz-CruzWangEtAl_extremelywidebandridge,
	title = {An extremely wideband ridge waveguide filter},
	booktitle = {2004 IEEE MTT-S International Microwave Symposium Digest},
	volume = {2},
	year = {2004},
	month = {June},
	pages = {615-618},
	abstract = {An extremely wideband ridge waveguide filter is presented. The fractional bandwidth of the filter can be greater than 115\%. An input and output transition from ridge waveguide to stripline and then to coax is also designed. The analysis is done with mode matching method and verified with Ansoft HFSS. For validation purpose, a test filter with pass band from 3 GHz to 9 GHz has been designed. The results by both mode matching method and Ansoft HFSS are presented. Excellent agreement is obtained. The test filter is designed using air filled ridge waveguide; however the same design procedure can be equally applied to other manufacturing techniques such as LTCC.},
	keywords = {air filled ridge waveguide, fractional bandwidth, mode matching, mode matching method, ridge waveguides, strip lines, stripline, waveguide filters 3 to 9 GHz, wideband ridge waveguide filter},
	issn = {0149-645X},
	doi = {10.1109/MWSYM.2004.1336059},
	url = {http://ieeexplore.ieee.org/iel5/9277/29472/01336059.pdf?tp=\&isnumber=\&arnumber=1336059},
	author = {Liu, Z M and J A Ruiz-Cruz and Wang,C and Zaki, K A}
}
@article {03_IEEPMAP_Ruiz-CruzEstebanRebollar_Efficientboundarycontour,
	title = {Efficient boundary contour mode-matching method of H- and E-plane junctions by fast Fourier transform algorithm},
	journal = {IEE Proceedings Microwaves, Antennas and Propagation},
	volume = {150},
	number = {5},
	year = {2003},
	month = {Oct.},
	pages = {332-338},
	abstract = {An efficient boundary contour mode-matching method (BCMM) is applied to the analysis of H- and E-plane junctions with planar and circular boundaries. The proposed approach is based on the use of the fast Fourier transform (FFT) to improve an analytical BCMM method. The electromagnetic field inside the structure is expressed in terms of circular waves, whereas in the rectangular ports a modal expansion is used. Depending on the shape of the contour, the original field expansion is rewritten in plane waves or in other sets of circular waves, replacing the conventional numerical integrations by a new, more suitable procedure. Finally, the transformation between the different expansions is carried out by means of the FFT, increasing notably the efficiency of the method. The presented formulation is verified by comparing simulated results with those obtained by other numerical techniques},
	keywords = {boundary contour mode-matching method, circular boundary, circular waves, coupling integrals, efficient method, electromagnetic field, electromagnetic fields, fast Fourier transform algorithm, fast Fourier transforms, FFT algorithm, field expansion, fullwave analysis, H-plane junctions, junction matrix, mode matching, planar boundary, plane waves, simulated results, waveguide junctions E-plane junctions},
	issn = {1350-2417},
	doi = {10.1049/ip-map:20030775},
	url = {http://ieeexplore.ieee.org/iel5/2196/28221/01262347.pdf?tp=\&isnumber=\&arnumber=1262347},
	author = {J A Ruiz-Cruz and Esteban,J and Rebollar, J M}
}
