Design of a Full-Duplex Wireless Power and Data Transfer System With Negligible Data Crosstalk

This paper proposes a novel wireless power transfer system that integrates full-duplex communication functionality with negligible crosstalk between coupling coils. The system employs an LCC circuit as the overall topology for simultaneously transmitting power and forward data, while reverse data is synchronized at another frequency through the addition of an external inductive link using a separate S-S circuit transmission channel. This paper analyzes the power transfer process and introduces the modulation, extraction, and demodulation circuits for data transfer, detailing the function of each component in the proposed system. Additionally, a theoretical analysis of the interference between power and data transmission indicates that such interference can be significantly reduced through proper design. Moreover, this paper establishes a transmission simulation model for the proposed system and provides a parameter design methodology. Practical measurements show that the interference between forward and reverse data transmission does not affect data modulation, nor does it impact power transfer and data transfer. Finally, based on the simulation parameters, an experimental platform was established. Experimental results demonstrate that the proposed system achieves a stable forward data transfer rate of 20 kbit/s and a robust reverse data transfer rate of 66.6 kbit/s under full-duplex operation. The results confirm that the interference between the two channels is negligible, validating the feasibility and effectiveness of the proposed topology.