Human-Body Aware Beamforming for Microwave Power Transmission

This paper presents a method of the microwave exposure reduction method on the human body for the microwave power transmission system. The channel from the transmitter to the additional receiver by way of the human body is measured, and the power-inversion-adaptive array (PIAA)-based beamforming is performed by exploiting the living-body radar algorithm. The experimental results demonstrate that the human-body exposure is reduced by 10 dB approximately when the subject is 1 m away from the transmitter.