一种C频段散射角分集双波束馈源的设计  

Design of a C-band Dual-beam Feed for Angular Diversity Antenna System

作　　者：李阳[1] 赵显超[2] 徐松毅[1] 

机构地区：[1]中国电子科技集团公司第五十四研究所,河北石家庄050081 [2]中国人民解放军空军驻石家庄地区军事代表室,河北石家庄050051

出　　处：《无线电工程》2015年第11期52-55,共4页Radio Engineering

基　　金：国有部委基金资助项目

摘　　要：针对散射通信中角分集天线双喇叭馈源方式分集效果不佳的问题, 设计了一种角分集双波束馈源. 采用锥变分支与膜片分支相结合的方式, 在不增加结构复杂度的基础上改善了OMT耦合端口的驻波; 用介质杆天线代替喇叭天线,从而减小了馈源辐射口面的横向尺寸, 克服了因双馈源体积大而无法满足理想分集效果波束夹角 （ 0. 75~1倍波束宽度）要求的问题. 应用CST对双波束馈源模型进行了优化设计, 在要求的12.7%的带宽内驻波低于1.3.A dual-beam feed has been designed in this work,to solve the problem that a two-horn feed in angular diversity antenna system usually can not achieve the desired diversity result.The VSWR of the coupling port of OMT has been reduced by placing septum in the stepped-impedance transformation;and the size of the feed has been decreased by using rod dielectric antenna instead of horn antenna so that the feed can meet the requirement of the best squint angle（0.75~1 times of the beam width）.The dual-beam feed has been designed and optimized by the CST code,the VSWR is less than 1.3 in the bandwidth of 12.7%.

关 键 词：角分集 双波束馈源 正交模耦合器 介质杆天线 

分 类 号：TN911[电子电信—通信与信息系统]