Simultaneous Wireless Power and Data Transfer System With Full-Duplex Mode Based on LCC/CLC Resonant Network

Abstract

Demand for the wireless power transmission system with real-time and full-duplex data transmission, a high-frequency carrier injection full-duplex simultaneous wireless power and data transfer (SWPDT) system is proposed. An <italic xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">LCC/CLC</i> compensation structure is applied in the power transfer channel to achieve voltage stabilization and reduce the power interference on the data transmission. An <italic xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">LC</i> parallel branch is utilized in the data receiving circuit to suppress ipsilateral data source crosstalk in full-duplex communication. This article theoretically demonstrates the voltage gain characteristics of the power and data transfer channels. Then, the crosstalk between bidirectional data transmission is discussed, along with the analysis of the power effect on the data transmission. In addition, the parameter design method is presented to optimize the data transmission gains while suppressing interference and crosstalk. Finally, the experimental prototype with 20 W output power, 250 kbps forward data rate, and 170 kbps backward data rate is built to verify the correctness and effectiveness of the proposed full-duplex SWPDT system.