基于超表面的低剖面高增益圆极化天线  

A low profile high gain circularly polarized antenna based on metasurface

作　　者：刘长青 张量 万志伟[2] 俞兴传 黄志祥 吴先良 LIU Changqing;ZHANG Liang;WAN Zhiwei;YU Xingchuan;HUANG Zhixiang;WU Xianliang(Key Lab of Ministry of Education of Intelligent Computing&Signal Processing,Anhui University,Hefei 230601,China;Anhui Province Key Laboratory of Simulation and Design for Electronic Information System,Hefei Normal University,Hefei 230601,China)

机构地区：[1]安徽大学计算智能与信号处理教育部重点实验室,合肥230601 [2]合肥师范学院安徽省电子信息系统仿真设计重点实验室,合肥230601

出　　处：《电波科学学报》2021年第1期96-100,共5页Chinese Journal of Radio Science

基　　金：国家自然科学基金(61971001,61871001,61722101);2018年度安徽省自然科学研究重大项目(KJ2018ZD046);安徽省质量工程(2017sxzx40)。

摘　　要：提出了一种基于缝隙耦合超材料表面的低剖面圆极化高增益天线,该天线由一个超材料表面和一个微带缝隙天线紧贴着组成.通过改变超表面切角的大小来产生圆极化波,同时还可以提高天线增益和拓宽阻抗带宽.为了验证仿真结果,制作和测量了一个大小为1λ×1λ×0.067λ(在10 GHz处)的样本天线,仿真和测量结果显示出良好的一致性.结果表明,在整个工作带宽内天线的增益均在7.5 dB以上,最大增益达到10.5 dB,比普通缝隙天线提高了5.3 dB,阻抗带宽(S11<−10 dB)为27.4%,轴比带宽(AR<3 dB)达到12.3%.因此,该天线能同时满足低剖面、圆极化、高增益等多种性能的要求,可以应用于许多领域.In this paper,a low profile high gain circularly polarized antenna based on aperture coupled metasurface is proposed.The antenna consists of a metasurface and a microstrip slot antenna,which are clinging to each other.Circular polarization waves can be generated by changing the size of the metasurface cut angle,while improving the antenna gain and widening the impedance bandwidth.In order to verify the simulation results,a sample antenna with a size of 1λ×1λ×0.067λ(at 10 GHz)was fabricated and measured.The simulation and measurement results show good consistency.The results show that the gain of the antenna is above 7.5 dB and the maximum gain is 10.5 dB over the entire working bandwidth,which is 5.3 dB higher than the ordinary slot antenna,the−10 dB impedance bandwidth and 3 dB axial ratio bandwidth can reach 27.4%and 12.3%,respectively.Therefore,the antenna can meet the requirements of low profile,circular polarization and high gain,and can be used in many fields.

关 键 词：超材料 低剖面 圆极化 高增益 

分 类 号：TN823.24[电子电信—信息与通信工程]