A Study on Automatically Target-Chasing Microwave Power Transfer Systems in Multipath Environments

In this paper, we propose novel retrodirective systems to improve the efficiency and safety of microwave power transmission (MPT) systems in multipath environments. The retrodirective system consists of an array antenna with phased conjugation circuits and it sends back the phase-conjugate signal toward the pilot signal transmitted from the receiver. It is usually applied for one receiver MPT system, however, Ossia corp. develops the new retrodirective system in multipath environments named 'Cota'. We simulated the detail of the Cota system, e.g., one receiver in multipath circumstance, one receiver with obstacle in the multipath circumstance, and multi receiver. Furthermore, we revised the retrodirective system with phase information as well as the amplitude information of the pilot signal to improve the MPT efficiency. We also find effect of the MPT efficiency by phase difference between two pilot signal sources. At last, we carried out the experiments of the retrodirective system in multipath circumstance to prove the simulation results.

Automated summary

This paper proposes novel retrodirective systems to enhance the efficiency and safety of microwave power transmission systems in multipath environments. The system utilizes an array antenna with phased conjugation circuits to send back the phase-conjugate signal to the receiver. The authors also improve the system by considering both the phase and amplitude information of the pilot signal. Simulation and experimental results validate the effectiveness of the system.