Research on key technologies of wireless power transfer based on the time-reversal electromagnetic wave

Precise regional energy focusing is a key technology involved in wireless power transfer. This paper proposes an adaptive coherent signal generation technique based on the time-reversal electromagnetic wave. Firstly, the inherent characteristics of the time-reversal electromagnetic wave are investigated. Then, the process of regional energy focusing based on the time-reversal technology is modeled on a distributed platform. Finally, based on the traditional time-reversal electromagnetic wave generation pathway, two improved envelope inversion modes are studied and verified by simulation. The results show that the time-reversal signal generated by the proposed method can adaptively form energy focus at the target position, and the signal processing process is simple. Also, the proposed method has low complexity, and it can preserve the intra-pulse information of the original signal without distortion. These results show that the proposed method has strong practicability and feasibility.