5.8 GHz具有谐波抑制功能的天线设计

摘要

无线输能技术因其不受线缆约束,能够适应各种地形和应用场合而受到重视.整流天线作为无线输能技术的重要组成部分,其整流效率直接影响整个无线输能系统的优劣.为提高整流效率,结合SIR结构设计了一个具有谐波抑制功能的5.8 GHz接收天线,从而整合接收天线和低通滤波器的部分性能,以消除传统整流天线中天线和滤波器之间的损耗和滤波器自身的损耗,从而提高整体整流效率.结果显示,该天线带宽仅为120 MHz,在二次谐波处回波损耗仅为-2.5 dB,性能良好.%The wireless transmission technologyfor its unbounded cable constraint and suitabilityto various terrains and applicationsattracts much attention from people.As an important part of the wireless transmission technology, the rectifying antenna directly affects the advantages and disadvantages of the wholewireless transmission system.In order to improve the rectification efficiency,a 5.8GHz receiving antenna with harmonic suppression functionis designed in combination with SIR structure, thustointegratesomeperformance ofthereceiving antenna and low-pass filter,eliminate the loss ofbetweenthe antenna and filter in thetraditional rectifying antenna and the loss of the filter itselfandimprove the overall rectification efficiency.Experiment indicates that theantenna, with bandwidthof only 120 MHz, and of only -2.5 dBat the second harmonic, is ofthe equivalent radiation performancefor the general antenna.