27.5 A Wireless Power Transfer System with Up-to-27.9% Efficiency Improvement under Coupling Coefficient Ranging from 0.1 to 0.39 Based on Phase-Shift/Time-Constant Detection and Hybrid Transmission Power Control

作者：Yu-Tang Chen, Yuxuan Luo, Yi‐Fan Lin, Lei Shao, Dihu Chen, Jianping Guo · 年份：2024 · DOI：10.1109/isscc49657.2024.10454528 · 被引用次数：9 · 研究领域：Wireless Power Transfer Systems、Energy Harvesting in Wireless Networks、Advanced Battery Technologies Research

Wireless power transfer (WPT) is a convenient way to power the wearable/portable devices with water/dusty-proof requirement. The end-to-end (E2E) efficiency $\eta_{E2E}$ is a key specification of WPT system. A compact and efficient solution for WPT receiver (RX) is using the reconfigurable resonant-regulated $(\mathrm{R}^{3})$ rectifier, which regulating the output through configuring the rectifier between charging (1X) and discharging (0X) modes [1]. Under light-load conditions, the 0X mode occupies most of time at RX, reducing the $\eta_{E2E}$ seriously if the transmission power of transmitter (TX) is fixed.