一种小型化超宽带双极化天线  

A Miniaturized UWB Dual-polarized Antenna

作　　者：陈松旻 庞晨[2] 周坚 刘萌瑶 赵梓彤 李高升 CHEN Songmin;PANG Chen;ZHOU Jian;LIU Mengyao;ZHAO Zitong;LI Gaosheng(College of Electrical and Information Engineering,Hunan University,Changsha 410082,China;College of Electronics Science and Engineering,National University of Defense Technology,Changsha 410073,China)

机构地区：[1]湖南大学电气与信息工程学院,长沙410082 [2]国防科学技术大学电子科学学院,长沙410073

出　　处：《微波学报》2024年第5期71-77,共7页Journal of Microwaves

基　　金：国家重点研发计划课题(2021YFC2203503)。

摘　　要：本文设计了一种小型化超宽带双极化天线。为实现小型化,Vivaldi天线设计了契合模拟能量密度波纹的拟合曲线槽缝,从而大大拓展了带宽。在未增大尺寸的同时设计了超表面透镜,在实现小型化的基础上提高了增益。将设计的单极化Vivaldi天线十字交叉镶嵌得到了最终的双极化天线。实测结果表明,双极化天线带宽为2.17 GHz~13.70 GHz,空间体积仅为0.1442λ1~3(λ1为带内最低频波长),最高增益达到12.32 dBi,隔离度大于30 dB。该天线可应用于雷达侦察系统等对极化敏感度要求高的应用场景。A miniaturized ultra wideband dual-polarized antenna is designed in this article.To achieve miniaturization,the Vivaldi antenna is designed with fitted curve slots that fit the simulate energy density corrugation,which expand the bandwidth.A metasurface lens is designed without increasing the size,and the gain is improved on the basis of miniaturization.After the designed single polarization Vivaldi antenna is crossed and embedded,a dual-polarized antenna is obtained.The dual-polarized antenna bandwidth is 2.17 GHz to 13.70 GHz,and the space volume is only 0.1442λ31(λ1 is the lowest frequency wavelength within the band),with a maximum gain of 12.32 dBi and an isolation degree of more than 30 dB.This antenna can be used in radar reconnaissance systems and other applications requiring high polarization sensitivit.

关 键 词：小型化 双极化天线 拟合曲线槽缝 超表面透镜 VIVALDI天线 

分 类 号：TN821.1[电子电信—信息与通信工程] TN821.5