Synthesis of linear array antenna of a large number of elements using Restricted Search Particle Swarm Optimization

In this paper, synthesis of a large number of linear arrays with Restricted Search Particle Swarm Optimization (RSPSO) is presented. The multi-objective synthesis problem of a reduced side-lobe level and a narrow beamwidth is considered. Accordingly, excitation amplitude of each array element and uniform inter-element spacing are optimized using the RSPSO. Restriction in search space is defined using the nested product algorithm. The effectiveness of the proposed method is highlighted through two design examples of 51- and 60-element linear arrays. The zero convergence value of the RSPSO algorithm in the design of the 60-element array indicates superiority over other contestant algorithms.