A Stochastic Algorithm for Beamforming Using ESPAR Antennas

Beamforming capabilities of electronically steerable passive array radiator (ESPAR) antennas have attracted considerable attention in recent literature. In this paper we consider a different beamforming approach, presenting an efficient optimization algorithm which enables such antennas to create specific transmit radiation patterns in real time, rather than patterns aiming at signal to interference ratio maximization. Moreover, we investigate the proposed algorithm over a novel multiple input - multiple output architecture, showing that even cost and size sensitive mobile handsets may efficiently operate in closed loop communication environments.