Generation of Narrow Beams from Concentric Circular Antenna Array for Wireless Communications using BAT Algorithm

摘要

The Sidelobe Level is very important radiation parameter which causes interference1 and noise in the wireless communications. In the present study an attempt is made to reduce the side lobe level of concentric circular antenna array by applying thinning process. In the process of thinning some of the elements are switched off without degrading the performance of the Antenna Array. Hence with the help of Meta heuristic Optimization technique like BAT algorithm thinning is applied to the concentric circular antenna array to reduce the Sidelobe level and Beam width and to retain the performance of the antenna array. The effect of thinning is observed for uniform and non uniform excitations. These results are compared with uniform amplitude distribution of fully populated array.