A 64.4% Efficiency 5.8GHz RF Wireless Power Transfer Receiver with GaAs E-pHEMT Rectifier and 45.2μs MPPT Time SIDITO Buck-Boost Converter Using VOC Prediction Scheme

📋 论文概要

本文提出了一种5.8GHz射频无线功率传输接收器，采用GaAs E-pHEMT整流器和SIDITO Buck转换器，实现了64.4%的峰值效率。该接收器解决了远距离（1-10m）功率传输中接收功率大幅波动的问题，并实现了45.2μs的快速最大功率点跟踪（MPPT）时间。

💡 主要创新点

• 采用GaAs E-pHEMT整流器在5.8GHz下实现高效率整流，支持1W以上功率等级。
• 提出SIDITO Buck转换器架构，实现45.2μs的快速MPPT响应，适应宽范围输入功率变化。
• 整体接收器在5.8GHz频段达到64.4%的端到端效率，适用于远距离无线供电。

🏷 关键词

📄 原文摘要

enables long-distance power transfer of 1~10m, eliminating the need for power supply wiring to a huge number of sensors in the IoT era. Recently, above 1W-class power receiver circuits (RX) are becoming required for short-time battery charging and high-performance sensor nodes. As shown in Fig. 12.6.1, the RX RF input power PIN varies significantly (10~30dBm) depending on the distance from the TX, and the output voltage of the rectifier widely fluctuates accordingly. Recently, rectifiers fabricated by GaAs enhancement-mode pseudomorphic high electron mobility transistor (E-pHEMT) monolithic microwave IC (MMIC) process that achieve maximum efficiency of 70~85% have been introduced [1]. However, the internal impedance of these rectifier is as high as several 100Ω, and at 30dBm PIN, the output

👥 作者与机构

Kyohei Ichikawa1, Tatsuki Iwata1, Saya Onishi1, Tomohiro Higuchi1,

Yuya Hirose2, Naoki Sakai2, Kenji Itoh2, Kousuke Miyaji1 Shinshu University, Nagano, Japan Kanazawa Institute of Technology, Nonoichi, Japan 1 2 RF wireless power transfer (WPT) system