Thinning of Semi-Elliptical and Quarter-Elliptical Antenna Array Using Genetic Algorithm Optimization

Design of thinned semi-elliptical and quarter-elliptical antenna arrays, with uniform excitation and uniform spacing using genetic algorithm (GA) optimization, is presented in this paper. Thinned arrays produce narrow directive beam without causing major degradation of fully populated antenna arrays. Semi-elliptical array contains antenna elements along half of the elliptical geometry and quarter-elliptical array contains antenna elements along one-fourth of the elliptical geometry. Optimization is employed on these array arrangements to reduce side-lobe level (SLL) of the arrays. Simulation results of the GA optimized thinned arrays are compared with a fully populated arrays for all the cases to illustrate the effectiveness of the proposed method.