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The switched beam antenna, a smart antenna technology, consists of an array of antennas, a beamforming network and a switching matrix. It may be used to generate n beams to improve the carrier to interference ratio (CIR) and the reuse of frequency in cellular systems, increasing system capacity. This paper describes simplified hardware and software techniques to improve antenna parameters such as: SLL, crossover, and beam orthogonality, by means of a pair of Butler matrices.
Antennas and Propagation Society International Symposium, 2005 IEEE (Volume:4B )
Date of Conference: 3-8 July 2005