A Dynamic Impedance Matcher to Broaden Input Power and Load Ranges for High-Power Rectifier in Microwave Wireless Power Transmission

IF 4 2区工程技术 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC

IEEE Transactions on Circuits and Systems II: Express Briefs Pub Date : 2024-08-01 DOI:10.1109/TCSII.2024.3436884

Shuang Pan;Weiguo Lu;Wei Song;Hui Xiao;Huaiqing Zhang

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Abstract

This brief presents a dynamic impedance matcher (DIM) for high-power rectifier in microwave wireless power transmission (MWPT) to enhance microwave rectifier efficiency over wide ranges of input power and load. The DIM based on an isolated Sepic converter performs dynamic impedance matching with the maximum power point tracking (MPPT). One digital processor is used to control multiple DIMs simultaneously to reduce power consumption. The DIM is implemented by a microcontroller and analog circuits and applied to 2.45 GHz system-level verification. The experimental results show that the overall power conversion efficiency (PCE) of the rectifier with DIM can reach more than 60% for the input power of 30 - 37 dBm and the load of 10 -

$4000~\Omega $

, where the efficiency of the isolated DIM reaches 91.7%. The input power range above 60% PCE of the rectifier is at least 3 times of that under the situation without DIM and 10 times for the load range as well.

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拓宽微波无线电力传输大功率整流器输入功率和负载范围的动态阻抗匹配器

本文介绍了一种用于微波无线功率传输（MWPT）中大功率整流器的动态阻抗匹配器（DIM），以提高微波整流器在宽输入功率和负载范围内的效率。基于隔离式 Sepic 转换器的 DIM 通过最大功率点跟踪 (MPPT) 实现动态阻抗匹配。一个数字处理器可同时控制多个 DIM，以降低功耗。DIM 由微控制器和模拟电路实现，并应用于 2.45 GHz 系统级验证。实验结果表明，在输入功率为 30 - 37 dBm、负载为 10 - $4000~\Omega $ 时，带 DIM 的整流器的整体功率转换效率（PCE）可达到 60% 以上，其中隔离式 DIM 的效率达到 91.7%。整流器 60% 以上 PCE 的输入功率范围至少是无 DIM 情况下的 3 倍，负载范围也是 10 倍。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

IEEE Transactions on Circuits and Systems II: Express Briefs 工程技术-工程：电子与电气

CiteScore

7.90

自引率

20.50%

发文量

883

审稿时长

3.0 months

期刊介绍： TCAS II publishes brief papers in the field specified by the theory, analysis, design, and practical implementations of circuits, and the application of circuit techniques to systems and to signal processing. Included is the whole spectrum from basic scientific theory to industrial applications. The field of interest covered includes: Circuits: Analog, Digital and Mixed Signal Circuits and Systems Nonlinear Circuits and Systems, Integrated Sensors, MEMS and Systems on Chip, Nanoscale Circuits and Systems, Optoelectronic Circuits and Systems, Power Electronics and Systems Software for Analog-and-Logic Circuits and Systems Control aspects of Circuits and Systems.