Determination of the Optimal Design of Three- Ring Concentric Circular Antenna Array Using Evolutionary Optimization Techniques

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). Real coded Genetic Algorithm (RGA) is adopted for the comparative optimization. The present text assumes nonuniformly excited array and a design goal of maximizing SLL reduction using the above two evolutionary optimization techniques. Among all the designs, the threering 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 (-16.3 dB) for the above optimal set.