Research on Full‐Duplex Data Transfer Simultaneously Based on Wireless Power System

ABSTRACT Considering the poor quality of communication in wireless power systems in some special environments, this paper proposes a full‐duplex simultaneous wireless power and data transfer (SWPDT) system. The power compensation circuit adopts a bilateral LCC structure, and the data transmission loop adopts a structure of series injection and parallel extraction. For the power and data transmission, they are not interfered by each other because of the self‐isolation characteristics of the power compensation circuit. And the interference between the forward and backward data on the same side is well suppressed by the designed LC blocking circuit in full‐duplex transfer mode. There are less LC components of data transfer loop access to the power compensation circuit without sacrificing performance compared with those data transfers only in parallel or serial mode. In addition, the parameter design method is presented to optimise the SNR while suppressing interference and crosstalk. Finally, an experimental platform was built to verify that the data can be transmitted stably in full‐duplex. The transmission rate of forward data is 200 kbps at 1 MHz carrier frequency, and the transmission rate of backward data is 344 kbps at 2 MHz carrier frequency. And the mutual interference of power and data transmission is isolated.