WIRELESS POWER TRANSFER USING BINARY BAT ALGORITHM-BASED BEAMFORMER

Abstract

Recently, wireless power transfer technology, which is transmitted via radio
frequency power, is considered as a promising technology. This technology provides
a cost-effective energy supply to low-power devices in the future era of the Internet
of Things. However, there will a large number of devices in electromagnetic
environments, so they can interfere with each other. To achieve effective power
delivery in space, this paper proposes an efficient beamformer that can focus
energy on the direction of the desired people and minimize energy in the direction
of undesired people (interferences). This beamformer is based on binary bat
algorithm and on the technique of controlling complex weights. The results prove
that the proposed beamformer can effectively maintain the main lobe, suppress
interferences, and surpass a beamformer based on binary particle swarm
optimization in terms of sidelobe suppression ability and computational time.