A Healing System for Failed Antenna Array using PSO

In large antenna arrays possibility of getting faults for some of the radiating elements can not be denied at all the times. In such situation the pattern of the array gets distorted mostly with an increasing sidelobe level (SLL) and removal of the nulls, if any, from its desired position. In this paper a healing system using particle swarm optimization (PSO) is developed for these failed antenna arrays. Reconfiguration of the amplitude and phase distribution of the remaining working elements in a failed array can improve the SLL and also maintain the null position. The main purpose of using the PSO technique is its ease of implementation. Compared to its other counterparts, the PSO algorithm is simple, easy to code and a high performance computational technique.