Simultaneous Wireless Power and Data Transfer System With Full-Duplex Mode Based on Dual-Resonant Frequencies and Resistance-Based Duplexer

For wireless power transfer (WPT) system, reliable data exchange between the transmitting side and the receiving side is generally required to improve the overall performance of the system. In this paper, a dual-resonant full-duplex communication method with resistance-based duplexer is presented. The two resonant frequencies of the reconfigurable double-sided LCC topology are, respectively, selected to exchange data in the forward and the backward data channel. The performance of the data transfer channel operated under the two frequencies, including the data receiving voltage and the response time of loops, are investigated, and the design considerations and principles to ensure similar transfer characteristics for different carrier frequencies are provided. The performance of the resistance-based duplexer is explored, and the corresponding parameter design is given. Furthermore, the interference between the power and data transfer channel is analyzed and the methodology to suppress the crosstalk is also provided. With the well-designed parameters, 1 kW power with a rate of 83.3 kbps full-duplex communication is obtained and the effectiveness of the proposed method is validated.