Side Lobe Reduction of Time Modulated Elliptical Antenna Array Using GA and PSO Algorithm

This paper presents an approach to design a 12-element time-modulated asymmetric elliptical antenna array (ATMEAA) for optimum far-field radiation pattern synthesis. By minimizing the sidelobe levels (SLLs), the far-field radiation pattern is designed to minimize the interference of ATMEAA. For achieving the ultra-low SLLs, an optimal combination of switchON time sequence and progressive phase delay is determined using meta-heuristic techniques, which are genetic algorithm (GA) and particle swarm optimization (PSO). ATMEAA is also considered for the practical antenna at fundamental frequency 2.4 GHz to calculate sideband levels (SBLs), feed network efficiency, and directivity using the GA and PSO techniques.