Handset Beamforming Synthesis Using PSO for 4G MobileCommunication Systems

摘要

In this paper we investigate the integration of monopole-antenna arrays into handheld devices in the 5.0-GHz band and study their capability for beamforming synthesis. Two different antenna array configurations integrated into the handset are considered. The first geometry is a 4-element linear array, but due to its inability to maximize the electric field in a broadside direction and simultaneously minimize in the opposite direction, it has limited applications. The second geometry consists of a 5-element array; four elements located at handset corners and the fifth-element located at the center. The particle swarm optimization (PSO) algorithm is used to optimize the complex excitations of the adaptive arrays elements in a mutual coupling environment for beamforming synthesis. All numerical simulations are performed using the FEKO Suite 5.3 software. To verify the validity of numerical simulations we first perform two validation tests (one-element monopole on a handset) and compare their results with published simulated and measurement results.