一种微波输能的高效二极管阵列整流电路设计与分析  

Design and Analysis of A High Efficiency Rectifier Circuit Based on Diode Arrays for Microwave Power Transmission

作　　者：宋炜 张淮清[1] 肖辉 彭文雄[1] 肖冬萍[1] SONG Wei;ZHANG Huaiqing;XIAO Hui;PENG Wenxiong;XIAO Dongping(Chongqing University State Key Laboratory of Power Transmission Equipment&System Security and New Technology,Chongqing 400044,China)

机构地区：[1]重庆大学输配电装备及系统安全与新技术国家重点实验室,重庆400044

出　　处：《空间电子技术》2020年第2期33-38,共6页Space Electronic Technology

基　　金：中央高校基本科研业务费国防科技创新专项(编号:2019CDJFDQ004)。

摘　　要：微波无线能量传输是实现远距离无线传能的主要方式之一,也是空间太阳能电站系统的核心技术之一。微波整流电路是实现微波到直流转换的关键环节,为实现大功率、远距离微波无线能量传输,文章设计了一种频率为2.45GHz的二极管阵列整流电路,能在大功率下完成高效整流,且对负载变化的敏感度低。测试表明:在27dBm输入功率、150Ω负载下,MW-DC转换效率最大达71.83%;输入功率为23~32dBm时的转换率高于65%;即使输入功率低至17dBm的转换率仍高于50%。因此,论文所提整流电路的输入功率动态范围大,最高可达32dbm,且转换效率高,可用于微波无线能量传输中。Microwave wireless power transmission(MWPT)is one of the main methods to achieve long-distance wireless energy transmission,which is also one of the core technologies of space solar power systems(SSPS).Microwave rectifier circuit is the key link to convert microwave power to DC power.In order to realize high-power and long-distance MWPT,a rectifier circuit based on diode arrays and operating at 2.45 GHz is designed in this paper,which is capable to achieve high efficiency power conversion under high input power,and appears low sensitivity to load changes as well.Measurement results show that the maximum MW-DC power conversion efficiency(PCE)reaches 71.83%under 27 dBm input power and 150Ω load;the MW-DC PCE keeps higher than 65%when the input power varies from 23 dBm to 32 dBm;even if the input power is as low as 17 dBm,the MW-DC PCE still exceeds 50%.Therefore,the proposed rectifier circuit features wide dynamic input power range and high power conversion efficiency,which can be applied in MWPT systems.

关 键 词：微波传能 整流电路 转换效率 二极管阵列 

分 类 号：TN820[电子电信—信息与通信工程]