Shaped beam array synthesis using particle swarm optimisation method with mutual coupling compensation and wideband feeding network

Abstract

This work presents the design, simulation and implementation of a linear array antenna with a fully constrained cosecant squared radiation pattern and a novel wideband feeding network. This antenna is constructed of wideband printed dipole antennas as the array elements in which the mutual coupling effect is properly compensated. For this purpose, a constrained particle swarm optimisation (PSO) algorithm is used as the synthesis method which is able to deal with multiple constraints in the desired radiation pattern. The excitations obtained from the PSO algorithm are applied to the design of a wideband feeding network which is able to deliver stable phase shifts and output powers to the array elements over the desired bandwidth. Finally, the simulation results are confirmed by the measurement results.