摘要
微波输能技术是空间太阳能电站、空间飞行器供能和无线传感网络领域的关键技术。本文设计了一套工作于2.45 GHz的高功率中距离微波输能系统,主要包括微波功率发生器、整流天线和收发天线。其中,微波功率发生器最大输出功率为53.272 dBm(212 W)时,末级放大器的漏极效率可达57.612%;当输入功率为30 dBm,负载为260Ω时,整流电路整流效率达到75%;采用简单的抛物面天线,传输距离为8m的情况下,波束捕获效率能够保持在45%以上。实测200W时微波发生器效率为49.3%,整流电路效率为63%,在波束捕获效率为45%时,理论计算的该系统直流到直流传输效率可以达到14%。
Microwave power transmission(MPT)is the key technology for the applications such as space solar power stations(SSPS),wireless powered aircraftes,and wireless sensor network(WSN).Here a high power microwave transmission system working at 2.45 GHz is demonstrated,which consists of microwave transmitter,transmitting and receiving antenna,and rectifier circuit.For the microwave power generator,the drain efficiency of the final stage amplifier reaches up to 57.612%when the maximum output power is 53.272 dBm(212 W).The efficiency of the rectifier circuit is as high as 75%when the input power is 30 dBm and the load is 260Ω.When the transmission distance is 8 m,the calculated beam capture efficiency can be maintained at more than 45%by use of the simple parabolic antenna.The measured results show that when the output power of microwave generator is 200W,the DC/RF efficiency is 49.3%and the efficiency of the rectifier circuit is 63%.Hence,when the beam capture efficiency is 45%,the DC/DC transmission efficiency of the system can reach up to 14%.
作者
周永金
徐露
戴黎辉
谭冲
ZHOU Yongjin;XU Lu;DAI Lihui;TAN Chong(Key Laboratory of Specialty Fiber Optics and Optical Access Networks,Shanghai University,Shanghai 200444,China;Shanghai Institute of Microsystem and Information Technology,Chinese Academy of Sciences,Shanghai 200050,China)
出处
《空间电子技术》
2020年第2期70-75,共6页
Space Electronic Technology
基金
国家自然科学基金(编号:61971469)
上海市自然科学基金(编号:18ZR1413500)。
