一种高隔离度毫米波双极化天线  

A high isolation millimeter wave dual polarization antenna

作　　者：刘耀 姜兴[1] LIU Yao;JIANG Xing(School of Information and Communication,Guilin University of Electronic Technology,Guilin 541004,China)

机构地区：[1]桂林电子科技大学信息与通信学院,广西桂林541004

出　　处：《桂林电子科技大学学报》2023年第6期517-522,共6页Journal of Guilin University of Electronic Technology

基　　金：广西创新驱动发展专项(桂科AA19254012-2)。

摘　　要：针对毫米波雷达高隔离度的要求,利用金属柱负载和交叉缝隙设计了一种毫米波双极化天线,其具有双线极化、宽带和高隔离性能。该天线的宽带特性由辐射贴片和寄生贴片的大小决定;高隔离特性是由于2种极化分层馈电,且加载金属柱于交叉缝隙旁,使缝隙更容易耦合能量。仿真结果表明,所设计天线的带宽为24.0~28.5 GHz,相对带宽为17.1%,频带内隔离度均高于47 dB,交叉极化比大于22 dB,实现了宽带、高隔离、低交叉极化的特性,适用于毫米波双极化雷达。According to the requirement of high isolation of millimeter wave radar,a millimeter wave dual polarization antenna was designed by using metal column load and cross slot.The antenna has dual polarization,broadband and high isolation performance.The broadband characteristic of the antenna is determined by the size of radiation patch and parasitic patch.The high isolation char-acteristic is due to two kinds of polarization layered feeding.The metal column is loaded next to the cross gap,so that the gap is easi-er to couple energy.According to the simulation analysis results,the bandwidth of the antenna is 24.0-28.5 GHz,the relative band-width is 17.1%,the isolation in the frequency band is more than 47 dB,and the cross polarization ratio is greater than 22 dB.It real-izes the characteristics of broadband,high isolation and low cross polarization,and is suitable for millimeter wave dual polarization radar.

关 键 词：毫米波 双极化天线 宽带 高隔离 低交叉极化 

分 类 号：TN822.4[电子电信—信息与通信工程]