X波段雷达干扰机圆极化天线设计  

Design of a Circularly Polarized Antenna for X-band Radar Jamming Systems

作　　者：吴昌松 于卫刚 宋欣豫 左国银 郭超辉 WU Changsong;YU Weigang;SONG Xinyu;ZUO Guoyin;GUO Chaohui(Luoyang Electronic Equipment Test Center of China, Luoyang 471003, Henan)

机构地区：[1]中国洛阳电子装备试验中心,河南洛阳471003

出　　处：《火控雷达技术》2020年第3期72-75,共4页Fire Control Radar Technology

摘　　要：本文设计了一个用于X波段的宽带圆极化天线。此天线可以用于组阵并作为雷达干扰机的一个器件。采用旋转螺旋公分网络实现了圆极化特性,并且通过改变功分网络的旋向,此天线可以接收左旋或者右旋圆极化雷达信号,并相应地发射右旋或者左旋干扰信号。辐射贴片与馈电网络采用分层设计,进行耦合馈电以实现宽带特性并提高隔离度。设计的天线具有轻质量、低剖面并且易组装等特点。仿真结果表明,天线具有8.75 GHz^10.65 GHz的阻抗带宽,同时在此带宽内轴比小于3 dB。天线交叉极化水平相对较低,可见天线具有良好的圆极化辐射特性。A broadband circularly polarized antenna in X-band is proposed in this paper.The proposed antenna can be implemented as an array and used as an element of a radar jamming system.The antenna has circular polarization characteristic because of its power dividing network design.By adjusting the rotation feature of the power dividing network,the antenna can receive left hand circular polarization(LHCP)or right hand circular polarization(RHCP)radar signals,and transmit RHCP or LHCP jamming signals.In addition,the radiating patch and feed network locate at different layers and coupled feeding is employed to realize broad band and high isolation.The antenna features low weight,low profile,and easy assembly.The simulation results show that the antenna has an impedance bandwidth of 8.75GHz^10.65GHz where its axial ratio is less than 3dB.The cross polarization level of the antenna is low,which indicates good circularly polarized radiation characteristic.

关 键 词：圆极化 宽带天线 耦合馈电 雷达干扰机 

分 类 号：TN953[电子电信—信号与信息处理]