Pattern synthesis of the offset reflector antenna system with less complicated phased array feed

Author

Chang, Dau-Chyrh ; Hu, Chang-Nan ; Hung, Chia-I ; Ho, Ko-Tai

Author_Institution

Electron. Dept., Chung Shan Inst. of Sci. & Technol., Lung-Tan, Taiwan

Volume

42

Issue

2

fYear

1994

fDate

2/1/1994 12:00:00 AM

Firstpage

240

Lastpage

245

Abstract

The performance degradation of an offset reflector antenna with off-axis scanning feed and distorted reflector surface can be improved by using a phased array feed. Generally, both analog attenuators and phase shifters are used in phased array feed. Yet, it seems to make the feed system very complicated. In this paper, a phase-only gradient search (POGS) algorithm is developed to optimize the performance of offset reflector antenna systems using phased array feed that is equipped with phase shifters only. This technique not only can greatly simplify the complexity of phased array feed, but also can provide the reflector antenna with better antenna gain and sidelobe level control capability. Simulation and experimental results are presented to illustrate the excellent performance of offset reflector, with limited beam scanning capability, can be obtained by using this less complicated phased array feed

Keywords

antenna feeders; antenna phased arrays; antenna radiation patterns; phase shifters; reflector antennas; analog attenuators; antenna gain; beam scanning; distorted reflector surface; experimental results; off-axis scanning feed; offset reflector antenna system; pattern synthesis; performance degradation; phase shifters; phase-only gradient search algorithm; phased array feed; sidelobe level control; simulation; Antenna arrays; Antenna feeds; Apertures; Attenuators; Degradation; Phase distortion; Phase shifters; Phased arrays; Radar antennas; Reflector antennas;

fLanguage

English

Journal_Title

Antennas and Propagation, IEEE Transactions on

Publisher

ieee

ISSN

0018-926X

Type

jour

DOI

10.1109/8.277218

Filename

277218