一种具有超宽输入功率范围的三路整流电路

A three-stage rectifier with ultra-wide input power range

本文提出一种具有超宽输入功率范围的三路整流电路.通过在三条整流支路中采用不同阈值电压的二极管,使每条支路对不同输入功率进行高效整流,三条整流支路协同作用,使所提出的整流电路能够在超宽输入功率范围内保持高效率工作;设计并实现了一个工作在2.4 GHz的三支路整流电路,三条整流支路分别实现在-10~11、11~24和24~35 dBm的功率范围内,效率保持在30%以上.测试结果表明:在-6~25 dBm的输入功率范围内,电路的转换效率均可保持在40%以上,最高效率可以达到71.2%.所提出的整流电路对输入功率的灵敏度较低,能够在超宽输入功率范围内实现高效率能量转换,可用于能量收集或动态无线能量传输系统中.

A three-stage rectifier containing three diodes is proposed in this paper.These diodes with different threshold voltages are located in three branches to achieve high conversion efficiency for different input power levels.By combining the three branches,the proposed rectifier is enabled to achieve high conversion efficiency over a wide dynamic input power range.A prototype of a 2.4 GHz rectifier is designed,simulated and measured.The efficiency of the three branches remains above 30%in the power range of-10-11 dBm,11-24 dBm and 24-35 dBm,respectively.The measured results show that the conversion efficiency maintains over 40%within the input power range of-6-25 dBm,with the maximum conversion efficiency reaching up to 71.2%.It indicates that the proposed rectifier can achieve low sensitivity to input power variation and high conversion efficiency over an ultra-wide input power range,which can be used in energy harvesting or dynamic wireless power transmission systems.