AN EFFICIENT BEAMFORMER FOR UNIFORM RECTANGULAR ARRAYS

Abstract

This paper proposes an efficient beamformer based on the binary bat
algorithm for uniform rectangular arrays of half-wavelength dipoles. The
proposed beamformer utilizes the technique of controlling only the amplitude of
excitation weights to produce optimal patterns with minimal distortions in
sidelobe regions while maintaining the main beam and imposing nulls in the
directions of interfering signals. To demonstrate this ability, the proposed
beamformer is evaluated through various scenarios and compared to a
beamformer based on binary particle swarm optimization.