Deformed Antenna Pattern Compensation Technique for Multi-Beam Antennas in Broadband and Scalable Mobile Communications Satellites

Yoshinori SUZUKI  Satoshi HARADA  Kiyoshi KOBAYASHI  Masazumi UEBA  

IEICE TRANSACTIONS on Communications   Vol.E90-B   No.9   pp.2280-2287
Publication Date: 2007/09/01
Online ISSN: 1745-1345
DOI: 10.1093/ietcom/e90-b.9.2280
Print ISSN: 0916-8516
Type of Manuscript: Special Section PAPER (Special Section on 2006 International Symposium on Antennas and Propagation)
Category: Antennas
communication satellite,  onboard antenna,  multi-beam,  phased array,  

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To create a next-generation mobile satellite communication system that offers large communication capacity, the onboard antenna system must be a multi-beam system consisting of a light weight 20-m class reflector and a light weight 100-beam class antenna feed system. We clarify that the antenna gain decrease created by the reflector surface distortion expected in orbit is relatively large. This paper presents a deformed antenna pattern compensation method that minimizes circuit scale. Validity of the proposed method is confirmed by antenna pattern calculations and experiments on a fabricated array-fed reflector antenna.