基片集成波导馈电的毫米波雷达阵列天线  

An Array Antenna Fed by Substrate Integrated Waveguide for Millimeter Wave Radar

作　　者：任宇辉[1] 白海灵 赵朗晗 崔锋 伍捍东 REN Yuhui;BAI Hailing;ZHAO Langhan;CUI Feng;WU Handong(School of Information Science and Technology,Northwest University,Xi′an 710127,China;Xi′an Hengda Microwave Technology Development Co.,Ltd.,Xi′an 710100,China)

机构地区：[1]西北大学信息科学与技术学院,西安710127 [2]西安恒达微波技术开发有限公司,西安710100

出　　处：《微波学报》2024年第5期9-14,共6页Journal of Microwaves

基　　金：陕西省重点研发计划项目(2022GY-096)。

摘　　要：为了满足毫米波雷达的应用需求,本文设计了一款工作于24 GHz的毫米波雷达阵列天线。该天线由八个1×8单元的微带串馈直线阵列组成平面阵列,每一个线阵采用中心馈电的形式,解决了传统串馈阵列波束偏离阵列法线的问题。同时,利用基片集成波导设计了低损耗的馈电网络,且将馈电网络和辐射贴片排布为两层,大大减小了天线的平面尺寸。此外,本设计中还利用泰勒综合法优化设计了阵列单元的宽度和功分器的分配比例,从而同时优化了天线E面和H面的旁瓣电平。测试结果表明,天线在23.7 GHz~24.2 GHz的频带内|S11|<-10 dB,相对带宽约为2.1%,最大增益为21.1 dB。天线在电场面旁瓣电平小于-20 dB,磁场面小于-23 dB,整体效率约为69%。In order to meet the application requirements of millimeter wave radar,a millimeter wave radar array antenna operating at 24 GHz is proposed in this paper.The antenna is a planar array composed of eight 1×8 microstrip series-fed linear arrays,and each linear array adopts the form of center feed which solves the problem that the beam of the traditional series-fed array deviated from the normal of the array.The substrate integrated waveguide is used to design a low loss feed network,which is arranged on a two-layer dielectric substrate with the radiating patches,and the area of the antenna is greatly reduced.In addition,Taylor synthesis method is used to optimize the width of the array element and the distribution ratio of the power divider,so as to optimize the sidelobe levels of both E and H planes.The measured results indicate that the impedance matching band of|S 11|<-10 dB in the frequency band from 23.7 GHz to 24.2 GHz.The relative bandwidth is about 2.1%and the maximum gain of the antenna is about 21.1 dB.The sidelobe level of the antenna on the electrical field plane is less than-20 dB and less than-23 dB on the magnetic field plane,and the overall efficiency is about 69%.

关 键 词：毫米波雷达天线 串联馈电阵列 基片集成波导 

分 类 号：TN957.2[电子电信—信号与信息处理]