@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} } @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} } @conference {05-WT-B-HAPSOverCities, title = {High altitude platforms (HAPs) W-CDMA system over cities}, booktitle = {Vehicular Technology Conference, 2005. VTC 2005-Spring. 2005 IEEE 61st}, volume = {4}, year = {2005}, month = {May}, pages = {2673-2677 Vol. 4}, keywords = {Artificial satellites, broadband networks, cellular radio, Cities and towns, code division multiple access, data users, Downlink, downlink capacity, downlink power control model, HAPs, high altitude platform station, Interference, Madrid, Multiaccess communication, nth power distance law, Phased arrays, Power control, Power system modeling, radio links, Satellite broadcasting, telecommunication control, uplink capacity, voice users, W-CDMA system, WCDMA, Wireless communication}, issn = {1550-2252}, doi = {10.1109/VETECS.2005.1543820}, author = {Taha-Ahmed, B and Calvo-Ramon, M and de Haro-Ariet, L} } @conference {04-WT-B-LeoSatellite, title = {LEO satellite W-CDMA downlink pole capacity}, booktitle = {Wireless Technology, 2004. 7th European Conference on}, year = {2004}, month = {Oct}, pages = {173-176}, keywords = {3G mobile communication, Artificial satellites, Downlink, Interference, Low earth orbit satellites, Multiaccess communication, Phased arrays, Power control, Power system modeling, Satellite broadcasting}, author = {Ahmed, B T and Ramon, M C and Ariet, L H} } @conference {03-WT-B-Air-HAPWCDMASystem, title = {Quasi-optimum downlink power control of high altitude platform W-CDMA system}, booktitle = {Vehicular Technology Conference, 2003. VTC 2003-Spring. The 57th IEEE Semiannual}, volume = {4}, year = {2003}, month = {April}, pages = {2476-2479 vol.4}, keywords = {3G mobile communication, aircraft communication, Base stations, broadband networks, cellular radio, cellular system, code division multiple access, Downlink, Geometrical optics, high altitude platform station, Interference, Multiaccess communication, Phased arrays, Power control, Power system modeling, quasioptimum downlink power control, radio links, telecommunication control, Telecommunication standards, third generation IMT-2000 service, WCDMA system, wideband code division multiple access, Wireless communication}, issn = {1090-3038}, doi = {10.1109/VETECS.2003.1208836}, author = {Ahmed, B T and Ramon, M C and Ariet, L H} }