Analysis of Simultaneous Wireless Power and Data Transfer System Based on DDR Coil

In order to realize a high-power, high-rate transmission system, it is necessary to improve the bandwidth and signal-to-noise ratio. In this paper, the Multiple inductive channels-simultaneously wireless power and data transmission (MIC-SWPDT) system is constructed by using DDR coils, two pairs of independent coils are isolated from the physical structure, and the magnetic fields are orthogonal to each other and decoupled in order to reduce the mutual interference. We also carry out the parameter design and transmission characteristics of the energy transmission circuit and information transmission circuit, establish the time domain model of the information transmission circuit, analyze the influence of different parameters on the information transmission gain and conversion time, and provide guidance for the parameter design. Finally, an experimental platform is set up to complete the synchronous transmission of energy and information at 5kw and 200kbps, which verifies the feasibility of the design.