Abstract：Existing simultaneous wireless power and signal transfer (SWPST) systems often employ full-bridge inverter topologies with complex control and high cost, and signal transmission can easily interfere with power transfer. This study explores a solution based on a single-switch inverter topology, characterized by simpler control and easier soft-switching to ensure high-efficiency wireless power transfer and low-interference synchronous transmission for both power and signal. This paper proposes an SWPST system architecture based on a Class-E# single-switch inverter. The power transfer channel consists of the Class-E# single-switch inverter and a full-bridge rectifier. The signal transfer channel employs a high-frequency carrier-injection method, coupling signals into the main power loop via custom magnetically shielded integrated transformers. The operational modes of the Class-E# inverter are analyzed, and the conditions for achieving zero-voltage switching (ZVS) are identified, along with the corresponding key parameter design formulas. A high-frequency equivalent circuit model of the signal channel is established, and expressions for the voltage gain and signal-to-noise ratio (SNR) are derived. Accordingly, the parameters of signal coil self-inductance and sampling resistance are jointly optimized. A proof-of-concept prototype is built, with a power-transfer frequency of 200 kHz and a signal-carrier frequency of 2 MHz. Experimental results show that the proposed system achieves a stable power output of 24.07 W under a 15 Ω load, with an overall system efficiency of 84.7%. Measured waveforms of the switch confirm that zero- voltage-switching turn-on is achieved over a wide load range. Simultaneously, the system achieves synchronous digital signal transmission at 200 kbps, with the demodulation circuit accurately restoring the original data waveform. The calculated overall efficiency (approximately 85%) aligns well with the measured value, with an error of less than 1%. The optimized signal channel parameters (signal coil inductance of 5 μH, sampling resistance of 60 Ω) ensure sufficient voltage gain while effectively suppressing inter-channel crosstalk. The proposed scheme addresses key limitations of conventional designs. Leveraging the intrinsic properties of the single-switch architecture significantly simplifies the control strategy and drive circuitry, reducing system complexity and potential costs. Furthermore, integrating the high-frequency carrier injection method, guided by the derived theoretical models for gain and SNR, enables effective co-design of power and signal paths. This systematic approach minimizes power-signal crosstalk, a critical challenge in shared-channel transfer. The agreement between theoretical and experimental results underscores the robustness of the modeling and optimization framework. This work provides a valuable and compelling alternative topology—characterized by simplicity, efficiency, and low interference—for the development of next-generation SWPST systems in applications ranging from consumer electronics to industrial sensors, where compact, cost-effective, and reliable simultaneous power and data delivery are paramount.
张路, 周钊屹, 杨奕, 李桂玉, 林治浩. 基于E#类单管逆变无线电能与信号同步传输系统[J]. 电工技术学报, 2026, 41(20): 6837-6849.
Zhang Lu, Zhou Zhaoyi, Yang Yi, Li Guiyu, Lin Zhihao. Simultaneous Wireless Power and Signal Transfer System Based on Class-E# Single-Switch Inverter. Transactions of China Electrotechnical Society, 2026, 41(20): 6837-6849.
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2026, Vol. 41 
