Sidelobe Reduction Algorithm for Electronic Steering Parasitic Antenna

Wenhua CHEN  Zhenghe FENG  

IEICE TRANSACTIONS on Communications   Vol.E88-B   No.11   pp.4406-4409
Publication Date: 2005/11/01
Online ISSN: 
DOI: 10.1093/ietcom/e88-b.11.4406
Print ISSN: 0916-8516
Type of Manuscript: LETTER
Category: Wireless Communication Technologies
parasitic antenna,  sidelobe level,  directivity,  steepest gradient algorithm,  

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To cut down the sidelobe level of radiation pattern, a novel adaptive algorithm is proposed for electronic steering parasitic antenna. The composite objective function in this algorithm takes both directivity and sidelobe level of pattern into account, and the steepest gradient algorithm is selected to search the optimum value of reactive load. Simulations are carried out to validate the algorithm, simulated results show that the levels of sidelobe are both below -4 dB in different beamforming cases, and the front to back ratios are better than 10 dB.