High-Efficiency Selective Wireless Power Transfer with a Bistable Parity-Time-Symmetric Circuit

Wireless power transfer has broad applications in e.g. consumer electronics and electric vehicles. Unfortunately, available methods to transfer power to one specific receiver out of many are inefficient, or rely on complicated tuning schemes. This study uses a bistable parity-time-symmetric circuit to achieve wireless power transfer that is efficient, robust, and selective. The authors show that the bistability provides access to system modes with highly asymmetrical energy distributions, enabling improved efficiency and selectivity. This work could lead to more versatile and energy-efficient wireless charging systems.