Adaptive Power Transmission for Multi-target of Microwave Wireless Power Transmission System

With the urgent demand for multitargets applications which used in long-range wireless power transmission (WPT) system, adaptive power transmission which used in microwave power transmission (MPT) system has caused widespread concern. This paper proposes a target-ware, power adaptive transmission method to fulfill this requirement. Based on the data returned by the targets, the microwave power beam is divided into multiple beams and transmitted to multitargets by the phased array antenna in the transmitter. According to the strategy, the power adaptive transmission method by adjusting the phase difference between distributed transmitter is implemented. Moreover, the closed-loop control schemes based on receiver and transmitter is also adopted. Finally, a 5. 8GHz/100W MPT system with two-targets is built and the theoretical analysis is proved by the experimental results.