Double In-Phase Superposition Time Reversal Method for Multi-User Wireless Power Transfer

Wireless Power Transfer (WPT) can completely eliminate the constraints of transmission cables, providing uninterrupted power to energy-consuming devices conveniently and flexibly. It is a revolutionary energy transmission technology with the potential to lead humanity into a truly wireless era. However, it is still challenging to realize in-phase superposition of the focus signal and the sidelobe signals received by one user in a multi-user WPT system. In this paper, we present an efficient double in-phase superposition time reversal (TR) method for multi-user WPT. First, we use TR technology to make the focus signals received by the receiver superimpose in phase. Then, the sidelobe signals of other receivers and the focus signals of this receiver are superimposed in phase through the vector group synchronous rotation (VGSR) method. We also show as the performance of the proposed method outperforms the traditional TR method.