Performance of multi-beam reflectors fed by phased array feeds with impedance-matching layers

Mou-Kehn Ng, Marianna Ivashina, Lotfollah Shafai

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

There has been a recent study which showed that metal-etched dielectric layers placed over Phased Array Feeds (PAFs) comprising open-ended waveguides can serve as effective impedance-matching structures [1]. That work, however, only considered the case of prime-focus single-beam reflectors, and did not examine the layers' effects on the aperture efficiency and its contributions of the entire PAF-fed reflector antenna. This motivates further investigations of such dielectric layers over PAFs. As an example, the present paper studies an array comprising open-ended sidewall-loaded hard rectangular waveguides such as considered in [3] and shown in Fig. 1. We demonstrate that over a large scan range of multiple beams, both the decoupling efficiency of the PAFs (the parameters which can be used to quantify the overall power losses due to reflection and mutual coupling effects of the array [2]) and the illumination efficiency of the reflector can be significantly improved.

Original languageEnglish
Title of host publication2010 IEEE International Symposium on Antennas and Propagation and CNC-USNC/URSI Radio Science Meeting - Leading the Wave, AP-S/URSI 2010
DOIs
StatePublished - 22 Nov 2010
Event2010 IEEE International Symposium on Antennas and Propagation and CNC-USNC/URSI Radio Science Meeting - Leading the Wave, AP-S/URSI 2010 - Toronto, ON, Canada
Duration: 11 Jul 201017 Jul 2010

Publication series

Name2010 IEEE International Symposium on Antennas and Propagation and CNC-USNC/URSI Radio Science Meeting - Leading the Wave, AP-S/URSI 2010

Conference

Conference2010 IEEE International Symposium on Antennas and Propagation and CNC-USNC/URSI Radio Science Meeting - Leading the Wave, AP-S/URSI 2010
CountryCanada
CityToronto, ON
Period11/07/1017/07/10

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