152068 20251017144621.0 doi 10.3390/electronics10141621 sideral 126872 ART-2021-126872 eng Baghdadi, H. Compact 2 × 2 circularly polarized aperture-coupled antenna array for ka-band satcom-on-the-move applications 2021 Access copy available to the general public Unrestricted This paper presents a novel design of a wideband circular polarization 2 × 2 microstrip antenna array working at Ka-band frequencies, from 27.5 to 31 GHz. This module is highly integrable with new silicon beamformer chips, creating a unit cell that can be part of a large electronically steer-able antenna for compact, ultra-low-profile, Satcom-on-the-move (SOTM) platforms. A multi-layer structure fabricated in standard printed circuit board (PCB) technology with high-yield substrates has been used. The radiating elements consist of double-stacked circular patches housed in a cavity and fed by H-shaped aperture coupling. It achieves a bandwidth of 16.5 % with a wide beam-width of 95¿ in the desired band, which is necessary for wide scanning angles in a large phased array. In the 2 × 2 unit cell, the antenna elements are distributed by means of a sequential rotation technique where the separation between two of them is 5.3 mm in the XY-plane. Broadside beam-widths ranging from 53.4¿ at 27.5 GHz to 42.1¿ at 31 GHz are achieved, with boresight directivities from 10.7 to 12.9 dBi, respectively, in both the RHCP and LHCP polarization. Moreover, mutual coupling levels below -20 dB and an axial ratio less than 3 dB in the whole band guarantee a good circular polarization purity. info:eu-repo/grantAgreement/ES/MINECO-FEDER/RTC2019-007039-7 info:eu-repo/semantics/openAccess by https://creativecommons.org/licenses/by/4.0/deed.es 2.69 2021 COMPUTER SCIENCE, INFORMATION SYSTEMS 100 / 163 = 0.613 2021 Q3 T2 PHYSICS, APPLIED 82 / 161 = 0.509 2021 Q3 T2 ENGINEERING, ELECTRICAL & ELECTRONIC 139 / 274 = 0.507 2021 Q3 T2 0.59 2021 Computer Networks and Communications 2021 Q2 Signal Processing 2021 Q2 Hardware and Architecture 2021 Q2 Control and Systems Engineering 2021 Q2 3.7 2021 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Royo Calderón,, G. Universidad de Zaragoza (orcid)0000-0002-2796-7022 Bel, I. Cortés, F.J. Celma Pueyo, S. Universidad de Zaragoza (orcid)0000-0003-0182-7723 5008 250 Universidad de Zaragoza Dpto. Ingeniería Electrón.Com. Área Electrónica 10, 14 (2021), 1621 [12 pp.] Electronics (Basel) Electronics (Basel) 2079-9292 7924931 http://zaguan.unizar.es/record/152068/files/texto_completo.pdf Versión publicada 2758951 http://zaguan.unizar.es/record/152068/files/texto_completo.jpg?subformat=icon icon Versión publicada oai:zaguan.unizar.es:152068 articulos driver 2025-10-17-14:21:49 ARTICLE