Single and Multiple Beams Synthesis Using Particle Swarm Optimization and Wavelet Based Method of Moments for Different Array Geometries

摘要

Smart multiple shaped beams synthesis from different dipole antenna arrays are studied using the method of moments (MoM) and particle swarm optimization (PSO) techniques. To overcome the storage capacity and computational time limitations of the MoM, the wavelet packet transform (WPT) is employed. The MoM/WPT result in a sparse matrix after a thersholding process. A single-ring circular array with 40 elements is designed for single beam switching. The MoM/WPT introduces a compression ratio of 26.2 %, and execution time of 0.025 Sec. Multiple-ring circular dipole arrays are demonstrated for single, or multiple beams. 2D planar dipole array arranged in sunflower arrangement and 3D dipole array arranged in cylindrical helical arrangements are optimized for single and dual beams in different directions. WPT compresses the matrix by 27 % and decreases execution time by 80 %. Switched beam in 60°, 120°, and 240° are estimated with high directivity and low SLL. The array analysis is achieved using MATLAB and FORTRAN codes with the inter-element coupling and edge effects are considered.