基于超表面的超宽带低剖面双极化天线  

A Low Profile Ultra-wideband Dual-polarized Antenna Based on Metasurface

作　　者：刘桂凤 杜彪[1] 何应然[1] LIU Guifeng;DU Biao;HE Yingran(The 54th Research Institute of CETC,Shijiazhuang 050081,China)

机构地区：[1]中国电子科技集团公司第五十四研究所,河北石家庄050081

出　　处：《无线电工程》2022年第2期268-273,共6页Radio Engineering

基　　金：国家部委基金资助项目。

摘　　要：提出了一款基于超表面的超宽带低剖面双极化天线。该天线由2对垂直放置的偶极子和超表面阵列组成。由于采用双极化形式,能够引入附加的谐振点,从而拓展了天线的带宽。为了实现低剖面特性,偶极子天线加载了具有同相反射相位的超表面阵列。此外,通过超表面阵列的切角设计,改善高频段的电压驻波比和辐射方向图。该天线剖面高度仅为38 mm(0.1λ),在0.81~2.35 GHz(97.4%)频带内,电压驻波比(VSWR)小于2,端口隔离度大于15 dB,增益为5~11 dBi。A low profile ultra-wideband dual-polarized antenna using metasurface is proposed.The proposed antenna is composed of two mutually orthogonal dipoles and one metasurface array.An additional resonance point is introduced due to the employment of dual polarization,and thus the operation band of the antenna is broadened.The metasurface having 0°reflected phase is used for a low profile design.In addition,the VSWR and the radiation patterns at the high frequency band are improved by the truncated corner design of the metasurface array.Finally,the profile height of the proposed antenna is only 38 mm(0.1λ),and the antenna exhibits a good VSWR less than 2,a good port isolation greater than 15 dB and an acceptable gain ranging from 5 dBi to 11 dBi in the frequency band of 0.81 GHz to 2.35 GHz(97.4%).

关 键 词：超表面 双极化天线 低剖面 宽频带 

分 类 号：TN82[电子电信—信息与通信工程]