Simulation and Implementation of Distributed Microwave Wireless Power Transfer System
Yuki Tanaka, Hikaru Hamase, Kazuki Kanai, Ryosuke Hasaba, Hiroshi Satō, Yoshio Koyanagi, Takuma Ikeda, Hiroyuki Tani, Manabu Gokan, Shoichi Kajiwara, Naoki Shinohara
Abstract
Recently, microwave power transfer (MPT) for Internet-of-Things (IoT) devices has been actively studied. The distributed microwave power transfer (DMPT) can supply power efficiently by cooperating multiple transmit antenna arranged distributed in a relatively wide area. In this article, the advantages of DMPT are shown by using ray-trace-based Monte Carlo simulation. In addition, an algorithm for optimizing the phase is proposed and discussed its convergence. Furthermore, the implementation of DMPT using a backscatter-based closed-loop system is proposed. The system was built using the open-source platform GNU Radio. Experimental results show the effectiveness of the proposed system.