TY - JOUR
T1 - Angularly Stable Linear-to-Circular Polarizing Reflectors for Multiple Beam Antennas
AU - Mercader-Pellicer, Salvador
AU - Tang, Wenxing
AU - Bresciani, Daniele
AU - Legay, Hervé
AU - Fonseca, Nelson J. G.
AU - Goussetis, George
N1 - Publisher Copyright:
IEEE
Copyright:
Copyright 2021 Elsevier B.V., All rights reserved.
PY - 2021/1/8
Y1 - 2021/1/8
N2 - In this paper a new concept to improve the angular stability of linear-to-circular polarizing reflectors is presented. It is first explicitly demonstrated that existing design approaches heavily rely on the adjustment of the design stack-up, namely the substrate height and relative permittivity, to the desired operating frequency. An approach is then proposed for decoupling the performance from the substrate parameters. The proposed approach provides increased design flexibility, resulting in performance improvement. Insight on the operating principle is provided resorting to equivalent circuit models. Subsequently, the benefits of the angularly stable reflection polarizer are demonstrated by a practical example involving a multiple beam antenna implemented using materials and processes compatible with satellite missions. The antenna exploits an innovative quasi-optical beam former as primary feed combined with a cylindrical polarizing reflector. Numerical and experimental results from this antenna architecture are presented to confirm the improvements achieved with the proposed concept over existing designs. The close comparison of simulations with measurements that is achieved validates the concept and the design approach.
AB - In this paper a new concept to improve the angular stability of linear-to-circular polarizing reflectors is presented. It is first explicitly demonstrated that existing design approaches heavily rely on the adjustment of the design stack-up, namely the substrate height and relative permittivity, to the desired operating frequency. An approach is then proposed for decoupling the performance from the substrate parameters. The proposed approach provides increased design flexibility, resulting in performance improvement. Insight on the operating principle is provided resorting to equivalent circuit models. Subsequently, the benefits of the angularly stable reflection polarizer are demonstrated by a practical example involving a multiple beam antenna implemented using materials and processes compatible with satellite missions. The antenna exploits an innovative quasi-optical beam former as primary feed combined with a cylindrical polarizing reflector. Numerical and experimental results from this antenna architecture are presented to confirm the improvements achieved with the proposed concept over existing designs. The close comparison of simulations with measurements that is achieved validates the concept and the design approach.
KW - frequency selective surfaces
KW - linear-to-circular polarizers
KW - multiple beam antennas
KW - reflector antennas
UR - http://www.scopus.com/inward/record.url?scp=85099593578&partnerID=8YFLogxK
U2 - 10.1109/TAP.2020.3048494
DO - 10.1109/TAP.2020.3048494
M3 - Article
AN - SCOPUS:85099593578
JO - IEEE Transactions on Antennas and Propagation
JF - IEEE Transactions on Antennas and Propagation
SN - 0018-926X
ER -