Compact 2 × 2 circularly polarized aperture-coupled antenna array for ka-band satcom-on-the-move applications

Baghdadi, H. ; Royo Calderón,, G. (Universidad de Zaragoza) ; Bel, I. ; Cortés, F.J. ; Celma Pueyo, S. (Universidad de Zaragoza)

Resumen: 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.

Idioma: Inglés

DOI: 10.3390/electronics10141621

Año: 2021

Publicado en: Electronics 10, 14 (2021), 1621 [12 pp.]
ISSN: 2079-9292

Factor impacto JCR: 2.69 (2021)

Categ. JCR: COMPUTER SCIENCE, INFORMATION SYSTEMS rank: 100 / 163 = 0.613 (2021) - Q3 - T2
Categ. JCR: PHYSICS, APPLIED rank: 82 / 161 = 0.509 (2021) - Q3 - T2
Categ. JCR: ENGINEERING, ELECTRICAL & ELECTRONIC rank: 139 / 274 = 0.507 (2021) - Q3 - T2

Factor impacto CITESCORE: 3.7 - Computer Science (Q2) - Engineering (Q2)

Factor impacto SCIMAGO: 0.59 - Computer Networks and Communications (Q2) - Signal Processing (Q2) - Hardware and Architecture (Q2) - Control and Systems Engineering (Q2)

Financiación: info:eu-repo/grantAgreement/ES/MINECO-FEDER/RTC2019-007039-7

Tipo y forma: Artículo (Versión definitiva)

Área (Departamento): Área Electrónica (Dpto. Ingeniería Electrón.Com.)