FIRE FLY AND ARTIFICIAL BEES COLONY ALGORITHM FOR SYNTHESIS OF SCANNED AND BROADSIDE LINEAR ARRAY ANTENNA

Abstract

This paper describes the application of two recently developed metaheuristic algorithms known as flre ∞y algorithm (FFA) and artiflcial bees colony (ABC) optimization for the design of linear array of isotropic sources. We present two examples: one for broad side arrays and the other for steerable linear arrays. Three instances are presented under each category consisting of difierent numbers of array elements and array pattern directions. The main objective of the work is to compute the radiation pattern with minimum side lobe level (SLL) for specifled half power beam width (HPBW) and flrst null beam width (FNBW). HPBW and FNBW of a uniformly excited antenna array with similar size and main beam directions are chosen as the beam width constraints in each case. Algorithms are applied to determine the non-uniform excitation applied to each element. The efiectiveness of the proposed algorithms for optimization of antenna problems is examined by all six sets of antenna conflgurations. Simulation results obtained in each case using both the algorithms are compared in a statistically signiflcant way. Obtained results using flre ∞y algorithm shows better performances than that of artiflcial bees colony optimization technique provided that the same number of function evaluations has been considered for both the algorithms.