Ku、Ka频段龙伯透镜馈源阵列技术研究  

Ku band and Ka band feed array technique in Luneberg lens antenna

作　　者：刘璟[1] 杨仕文[1] 钟鸣海[1] 王卓[1] 

机构地区：[1]电子科技大学电子工程学院微波工程系,四川成都611731

出　　处：《电波科学学报》2010年第2期363-367,共5页Chinese Journal of Radio Science

基　　金：总参项目:"龙伯透镜天线技术研究"

摘　　要：针对卫星通信中龙伯透镜天线不同频段的馈源并排放置导致最大波束指向的偏移,无法实现多频段馈源上、下行跟踪同一颗卫星,提出了馈源阵列馈电的方法。通过辐射口面采用介质杆天线取代喇叭以改进馈源,此方法减小了馈源的阵间距,利于馈源组阵。结果表明:利用馈源组阵技术可以解决波束偏焦问题,实现多频段收发同一颗卫星的目的,同时也分析了阵列馈源馈电对天线增益和效率的影响。In the satellite communication system,the parallel placement feeds of Luneberg lens antenna in multiple frequency bands results in the offset of beam directions.This deficiency makes it fail to track the same satellite in the uplink and downlink frequency bands simultaneously.A method of array feeding is presented.The conventional horn in the radiation aperture is replaced by the dielectric rod antenna,and the distance of array feed can be reduced which is more convenient for the composing of an array.Indicated by the result,the feeding array technique is adopted to solve the problem of focus deviation,which realizes the goal of communicating with the same satellite in mutiple frequency bands.Furthermore,the effects of the proposed feed array on the gain and efficiency of Luneberg lens antenna are analyzed.

关 键 词：龙伯透镜 介质杆天线 馈源阵列 卫星通信 

分 类 号：TN828.5[电子电信—信息与通信工程]