EFFICIENT CIRCULAR ARRAY SYNTHESIS WITH A MEMETIC DIFFERENTIAL EVOLUTION ALGORITHM

In this article, we introduce an improved optimization based technique for the synthesis of circular antenna array. The main objective is to achieve minimum side lobe levels, maximum directivity and null control for the non-uniform, planar circular antenna array. The design procedure utilizes an improved variant of a prominent and e-cient metaheuristic algorithm of current interest, namely the Difierential Evolution (DE). An e-cient classical local search technique called Solis Wet's algorithm is incorporated with the competitive Difierential Evolution. While the competitive DE is used for the global exploration, Solis Wet's algorithm is employed for local search. Combining the capability of both techniques the hybrid algorithm exhibits improved performance for circular array design problem. Three examples of circular array design problems are considered to illustrate the efiectiveness of the hybrid algorithm cDESW (Competiteve Difierential Evolution with Solis Wet's technique). The design results obtained using cDESW has comfortably outperformed the results obtained by other state-of-the- art metaheuristics like CLPSO, JADE.

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