A Pattern Synthesis Method for Multibeam Reflector Antennas

Hiroki SHOKI  Kazuaki KAWABATA  Tasuku MOROOKA  

IEICE TRANSACTIONS on Communications   Vol.E77-B   No.1   pp.64-72
Publication Date: 1994/01/25
Online ISSN: 
Print ISSN: 0916-8516
Type of Manuscript: PAPER
Category: Antennas and Propagation
antenna,  multibeam,  reflector,  pattern synthesis,  cluster feed,  

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A new pattern synthesis method for multibeam reflector antennas is described. The Directional Constrained Minimum Power (DCMP) method, which was developed as an adaptive array algorithm, has been applied to reflector antennas with cluster feeds. The main objective of this pattern synthesis is to optimize the excitation distribution of the cluster primary feed in order to reduce the sidelobe level and to attain a high main beam gain. A desired contour beam pattern has also been attained by modifying this method. Furthermore, this paper describes other applications of this method, such as pattern optimization taking account of the frequency characteristics and the change in the radiation pattern due to an antenna pointing system, cross-polarization reduction, and monopulse pattern synthesis for an RF sensor.