Side lobe reduction and beamwidth control of amplitude taper beam steered linear array using Tschebyscheff polynomial and particle swarm optimization

Abstract

Present paper examines the various aspects of beam steered linear array of isotropic radiators with uniform inter-element spacing. In order to control beam broadening and to achieve side lobe level (SLL) reduction in beam steered array, a novel method has been proposed modifying primarily the search space definition for Particle Swarm Optimization. Tschebyscheff polynomial and PSO has been used to develop the proposed method. Search space for PSO has been defined using Tschebyscheff polynomial for an amplitude taper beam steered linear array. PSO with the information of where to search finds the optimum excitation amplitude of the beam steered linear array to either achieve reduced Side Lobe Level and narrow beamwidth within the beam steering range. © Springer International Publishing Switzerland 2014.