Radiation Pattern Reconstruction from the Near-Field Amplitude Measurement on Two Planes using PSO

Abstract. The paper presents a new approach to the radia-tion pattern reconstruction from near-field amplitude only measurement over a two planar scanning surfaces. This new method for antenna pattern reconstruction is based on the global optimization PSO (Particle Swarm Optimiza-tion). The paper presents appropriate phaseless measure-ment requirements and phase retrieval algorithm together with a brief description of the particle swarm optimization method. In order to examine the methodologies developed in this paper, phaseless measurement results for two diffe-rent antennas are presented and compared to results obtai-ned by a complex measurement (amplitude and phase). Keywords Near-field, radiation pattern, planar near-field scann-ing, amplitude near-field measurement, phase recon-struction, global optimization, particle swarm optimi-zation (PSO). 1