Design of non-uniform concentric circular antenna arrays for side lobe reduction using the method of CRPSO

In this paper the optimal design for maximum sidelobe level (SLL) reduction of three-ring concentric circular antenna array (CCAA) is determined using a novel Particle Swarm Optimization (PSO) technique namely Craziness based Particle Swarm Optimization (CRPSO). Standard PSO is also adopted for the comparative optimization. The present text assumes non-uniformly excited and non-uniform inter-element spacing array with a design goal of maximizing SLL reduction using the above two evolutionary optimization techniques. Among all the designs, the three-ring structure containing (N₁=4, N₂=6, N₃=8) elements proves to be the optimal design owing to the highest SLL reduction achieved by each technique. CRPSO yields grand minimum SLL (-32.22 dB) for the above optimal set.