一种基于介质集成悬置线的高效率微波整流电路  

A high-efficiency microwave rectifier based on substrate integrated suspended line technology

作　　者：王玲 刘定南 和浩铭 刘长军[1,2] WANG Ling;LIU Dingnan;HE Haoming;LIU Changjun(School of Electronics and Information Engineering,Sichuan University,Chengdu 610064,China;Yibin Industrial Technology Research Institute of Sichuan University,Yibin 644000,China)

机构地区：[1]四川大学电子信息学院,四川成都610064 [2]宜宾四川大学产业技术研究院,四川宜宾644000

出　　处：《应用科技》2022年第5期52-57,共6页Applied Science and Technology

基　　金：国家自然科学基金项目(62071316);四川省科技项目(2021YFH0152)。

摘　　要：针对整流电路中微带传输线损耗高的问题,提出了一种基于介质集成悬置线(SISL)技术的高效率微波整流电路,首次实现了SISL与微波整流电路的有机结合。采用SISL结构将微波整流电路置于由多层介质基板堆叠而形成的金属腔内,降低了辐射损耗和插入损耗。通过理论计算得到SISL结构的等效介电常数,设计了基于SISL的直流滤波器和单枝节输入匹配网络,与肖特基二极管构成了微波整流电路。制作了基于SISL结构的工作频率为2.45 GHz的整流电路,测试结果与仿真结果吻合良好。在16.2 dBm输入功率和680Ω直流负载下,获得了80.6%的RF-DC转换效率。基于SISL的整流电路采用标准的印制电路板工艺设计,成本低、加工周期短,可大规模应用到无线能量传输技术中。A high-efficiency microwave rectifier based on the dielectric integrated suspension lines(SISL)is proposed to reduce the circuit losses in microstrip transmission lines.For the first time,the SISL technology has been applied to microwave rectifier design,in which both radiation loss and insertion loss are reduced.A microwave rectifier is integrated into a metal cavity based on SISL structures,which are stacked with multilayer substrates.The equivalent permittivity of SISL structures is obtained through theoretical analysis.Two fan-shaped DC filters and a single-stub input impedance matching are designed,which are applied to building a rectifier together with a Schottky diode.A microwave rectifier at 2.45 GHz was designed,fabricated and measured.The measured results agree with the simulation results well.The maximum RF-DC conversion efficiency reaches 80.6%at 16.2 dBm input power and with 680ΩDC load.In addition,the proposed microwave rectifier is designed using a standard printed circuit board process,which is with low cost and rapid fabrication.They may be applied to wireless energy transmission technology on a large scale.

关 键 词：微波无线能量传输 高效率 整流电路 辐射损耗 插入损耗 介质集成悬置线 自封装 低成本 

分 类 号：TN455[电子电信—微电子学与固体电子学]