A New Hybridized Backtracking Search Optimization Algorithm with Differential Evolution for Sidelobe Suppression of Uniformly Excited Concentric Circular Antenna Arrays

作者：Das Sudipta^*; Mandal Durbadal; Kar Rajib; Ghoshal Sakti Prasad

来源：International Journal of RF and Microwave Computer-Aided Engineering, 2015, 25(3): 262-268.

DOI：10.1002/mmce.20857

• backtracking search algorithm
• differential evolution
• mutation operator
• concentric circular antenna arrays
• sidelobe suppression

In this work, a hybridized combination of backtracking search algorithm (BSA) with differential evolution (DE) is proposed and applied on sidelobe suppression problem of uniformly excited concentric circular antenna arrays (CCAA). Each array is assumed to have isotropic elements and be placed on x-y plane and has one center element. A search for optimal setting of ring radius and number of elements in each ring is carried out so as to achieve low sidelobe performance on overall azimuth plane. Care has been taken so that directivity does not get degraded as far as possible. Before applying this algorithm to CCAA design problem, BSA and the hybridized algorithm BSA-DE are tested on five complex benchmark functions. Based on 30-independent runs for each benchmark function, Wilcoxon's pairwise signed ranks test is utilized to judge the relative search performance of these two algorithms. The hybridized algorithm proves its superiority on almost all the considered benchmark functions. For the CCAA design problem dealt with in this work, BSA-DE shows its superiority on one or both pattern parameters as well as structural parameters.

• 出版日期2015-3