@conference {Corcoles20171, title = {Optimization-based strategy in multiple-channel magnetic resonance systems operating at 128 MHz to reduce radiofrequency heating induced by active implantable medical devices}, booktitle = {2017 32nd General Assembly and Scientific Symposium of the International Union of Radio Science, URSI GASS 2017}, volume = {2017-January}, year = {2017}, note = {cited By 2}, pages = {1-3}, doi = {10.23919/URSIGASS.2017.8105232}, url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85046140205\&doi=10.23919\%2fURSIGASS.2017.8105232\&partnerID=40\&md5=2f1a69d9a5ebcca222c42b8feaf694eb}, author = {J C{\'o}rcoles and Zastrow, E. and Kuster, N.} } @article {16_PIERC_PAULA-SANCHEZ_TFG, title = {Omnidirectional Conformal Patch Antenna at S-Band with 3D Printed Technology}, journal = {Progress In Electromagnetics Research C}, volume = {64}, year = {2016}, pages = {43-50}, abstract = {A conformal patch array antenna with omnidirectional pattern in the azimuth plane at S-band is presented. A theoretical study of the generated ripple in the omnidirectional radiation pattern according to the number of faces that conform the array has been computed. A six-faced regular prism 3D structure has been chosen following a maximum 3 dB ripple criteria in the omnidirectional radiation pattern. A rectangular microstrip patch fed by a microstrip line has been designed as single radiating element. An equal power divider has been designed as feeding network in microstrip technology to feed each radiating element. Several prototypes have been manufactured and measured to validate the theoretical and simulated results. The entire conformal array has been assembled on a hexagonal regular prism manufactured in PolyLactic Acid (PLA) material using a 3D printer. In spite of the complexity of the proposed antenna structure, the used manufacturing processes, such as microstrip and 3D printing, allows to perform a low cost, low weight and compact final antenna. A higher radiated field ripple than the expected one is generated due to small deviations between experimental and theoretical critical parameters such as the feeding network performance or the 3 dB beam-width of the single element radiation pattern. A maximum ripple value of 4 dB has been experimentally obtained in the omnidirectional radiating pattern.}, issn = {1937-8718}, doi = {doi:10.2528/PIERC1602241}, url = {http://www.jpier.org/PIERC/pier.php?paper=16022410}, author = {P P Sanchez-Dancausa and J L Masa-Campos and P Sanchez-Olivares and E Garcia Marin} } @article {11_IETMAP_Ruiz-CruzMontejo-GaraiRebollar_OptimalFeeders, title = {Optimal configurations for integrated antenna feeders with linear dual polarization and multiple frequency bands}, journal = {IET Microwaves, Antennas and Propagation}, volume = {5}, number = {8}, year = {2011}, month = {June}, pages = {1016-1022}, abstract = {Different configurations for the antenna feeder of advanced microwave subsystems are introduced, working in several schemes which combine multiple frequency bands with two linear orthogonal polarisations. The aim of this study is to highlight state-of-art research results on different waveguide components for modern radio frequency (RF)/microwave subsystems, stressing the impact of the selected architecture in the whole system in both the electrical performance and the volume and size of the feeder. Two are the key components of this type of RF/microwave feeder: the ortho-mode transducer for polarisation discrimination and the multiplexers for separating the frequency bands. It will be shown that a careful study of the whole feeder architecture can simplify in some cases the individual components, with the consequent benefit in electric performance and size reduction. The computer-aided design of the presented architectures is outlined, showing examples for different applications and comparing numerical simulations by different methods with experimental results.}, issn = {1751-8725}, doi = {10.1049/iet-map.2010.0363}, url = {http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=5937003}, author = {J A Ruiz-Cruz and Montejo-Garai, J R and Rebollar, J M} } @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} } @article {5_Omni_antenna_slotsMOTL, title = {Omnidirectional circularly polarized slot antenna fed by a cylindrical waveguide in millimeter band}, journal = {Microwave and Optical Technology Letters}, volume = {49}, number = {3}, year = {2007}, month = {Mar.}, pages = {638-642}, abstract = {A circularly polarized slotted array antenna is presented. The array is fed by a circular waveguide propagating the TM01, to properly generate the required polarization. An omnidirectional azimuth radiation pattern is obtained, as well as a ?10{\textdegree}/+30{\textdegree} elevation antenna coverage. Low losses are achieved because of the waveguide feed. The slot array is mechanized over the metallic wall of the circular waveguide. Furthermore, the antenna presents a solid and rigid mechanical structure, which guarantees an optimum and repetitive response in a manufacturing process. A prototype antenna has been designed and measured. Satisfactory results have been obtained. The slotted array takes part from a signal detection system centered in 36.85 GHz.}, keywords = {Circular polarization, conformal slotted waveguide array, transversal magnetic mode, waveguide to coaxial transition}, issn = {0895-2477}, doi = {10.1002/mop.22207}, url = {http://onlinelibrary.wiley.com/doi/10.1002/mop.22207/abstract}, author = {J L Masa-Campos and Fern{\'a}ndez, J M and Sierra-P{\'e}rez, M} } @conference {02-WT-B-N-CDMA, title = {The overlay of intelligent FDSS system on N-CDMA system}, booktitle = {Personal, Indoor and Mobile Radio Communications, 2002. The 13th IEEE International Symposium on}, volume = {2}, year = {2002}, month = {Sept}, pages = {774-778 vol.2}, keywords = {144 kbit/s, 9.6 kbit/s, Base stations, capacity gain, carrier to interference ratio, channel capacity, CIR, code division multiple access, Code division multiplexing, diversity reception, Downlink, Frequency diversity, frequency diversity spread spectrum system, Frequency estimation, imperfect power control, intelligent FDSS system, Intelligent systems, Interference, mobile radio, N-CDMA system, Narrowband, narrowband code division multiplexing access system, Power control, spread spectrum communication, telecommunication control, unilocated base stations, uplink}, doi = {10.1109/PIMRC.2002.1047327}, author = {Ahmed, B T and Ramn, M C and de Haro Ariet, L} }