研究目的
To investigate a simultaneous wireless information and power transfer system using separated frequency bands for energy and data, with a focus on optimizing circuit elements numerically and demonstrating high data rates with a GaN-based converter.
研究成果
The dual-band SWIPT system with numerically optimized components and GaN power devices achieves high data transfer rates (over 450 kbps) without compromising power transfer efficiency, demonstrating the potential of wideband gap devices for such applications.
研究不足
The system may be affected by parameter deviations and parasitics, as seen in the deviation of the resonant frequency f2 from the optimized value. The use of GaN devices increases noise spectral density, and the approach may not be optimal for all modulation schemes.
1：Experimental Design and Method Selection:
The system uses a dual-band SWIPT approach with frequency-division multiplexing. Circuit components are numerically optimized for efficiency and data rate. A series-series topology is employed for improved efficiency.
2：Sample Selection and Data Sources:
Not specified in the paper.
3：List of Experimental Equipment and Materials:
Includes GaN HEMTs (e.g., GS66504B), gate drivers (Silabs), microcontroller (MPC5643L), litz wires, ferrite cores, Schottky diodes (MBRS10100), and an Analog Discovery 2 system.
4：Experimental Procedures and Operational Workflow:
A full-bridge DC-AC converter is implemented on the primary side, with a rectifier on the secondary side. Data transmission uses on-off keying with a half-bridge circuit and envelope detector. Measurements are taken for efficiency, data rate, and waveforms.
5：Data Analysis Methods:
Kirchhoff's circuit laws are used for system analysis, and channel capacity is calculated based on signal-to-noise ratio.
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