用于无线射频能量收集系统的2.45GHz高效整流电路设计

Design of 2.45 GHz High-Efficiency Rectifying Circuit for Wireless RF Energy Collection System.

作者信息

Huang Yanhu, Liang Jiajun, Wu Zhao, Chen Qian

机构信息

Guangxi University Key Lab of Complex System Optimization and Big Data Processing, Guangxi Applied Mathematics Center, Yulin Normal University, Yulin 537000, China.

School of Electronic and Information Engineering, South China University of Technology, Guangzhou 510641, China.

出版信息

Micromachines (Basel). 2024 Feb 29;15(3):340. doi: 10.3390/mi15030340.

DOI:10.3390/mi15030340

PMID:38542587

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC10972119/

Abstract

A 2.45 GHz high-efficiency rectifying circuit for a wireless radiofrequency (RF) energy collection system is proposed. The RF energy collection system is composed of a transmitting antenna, a receiving antenna, a rectifying circuit and a load. The designed receiving antenna is a kind of dual-polarised cross-dipole antenna; its bandwidth is 2.3-2.5 GHz and gain is 7.97 dBi. The proposed rectifying circuit adopts the technology of an output matching network, which can suppress the high-harmonic components. When the input power at 2.45 GHz is 13 dBm and the load is 2 kΩ, the highest conversion efficiency of RF-DC is 74.8%, and the corresponding maximum DC output voltage is 4.92 V. The experiment results are in good agreement with the simulation results, which shows a good application prospect.

摘要

提出了一种用于无线射频（RF）能量收集系统的2.45GHz高效整流电路。该射频能量收集系统由发射天线、接收天线、整流电路和负载组成。所设计的接收天线是一种双极化交叉偶极天线；其带宽为2.3 - 2.5GHz，增益为7.97dBi。所提出的整流电路采用输出匹配网络技术，可抑制高次谐波分量。当2.45GHz的输入功率为13dBm且负载为2kΩ时，射频 - 直流的最高转换效率为74.8%，相应的最大直流输出电压为4.92V。实验结果与仿真结果吻合良好，具有良好的应用前景。