A Multiple Shaped Beam Antenna Using a Single Shaped Reflector

Hiroki SHOKI  Kazuaki KAWABATA  

Publication
IEICE TRANSACTIONS on Communications   Vol.E76-B   No.12   pp.1500-1507
Publication Date: 1993/12/25
Online ISSN: 
DOI: 
Print ISSN: 0916-8516
Type of Manuscript: Special Section PAPER (Special Issue on 1992 Internatioal Symposium on Antennas and Propagation)
Category: 
Keyword: 
antenna,  multibeam,  shaped beam,  shaped reflector,  

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Summary: 
The authors propose a multiple shaped beam antenna which uses a single shaped reflector and simple feeds. This new type of multibeam antenna is very attractive for satellite communications and broadcasting because its beam-forming network is much simpler than conventional multibeam reflector antennas which uses cluster feeds. The design method for shaping the reflector surface is described, which is based on the concept of an equivalent array. By using this method, a design example is shown, in which the Japanese main islands are covered with four beams and twofold frequency reuse is operated. Also, the basic performance of this new antenna is clarified numerically.