基于超表面的极化可重构天线设计  

Design of polarization reconfigurable antennas based on metasurface

作　　者：袁一杰 孙学宏 YUAN Yijie;SUN Xuehong(School of Physics and Electronic-Electrical Engineering,Ningxia University,Yinchuan750021,China;School of Information Engineering,Ningxia University,Yinchuan750021,China;Ningxia Key Laboratory of Intelligent Sensing for Desert Information,Yinchuan750021,China)

机构地区：[1]宁夏大学物理与电子电气工程学院,宁夏银川750021 [2]宁夏大学信息工程学院,宁夏银川750021 [3]宁夏沙漠信息智能感知重点实验室,宁夏银川750021

出　　处：《电子元件与材料》2022年第9期994-1000,共7页Electronic Components And Materials

基　　金：国家自然科学基金(62061039)。

摘　　要：提出了一种基于超表面的极化可重构天线设计,由上层结构的圆弧切角矩形单元和下层结构的微带缝隙天线组成。通过采用机械方式旋转圆弧切角矩形单元结构,分析了超表面天线的极化可重构功能。设计的超表面天线能够在3.20~3.64 GHz内实现左旋圆极化、右旋圆极化和线极化三种极化方式,且可以相互转换。超表面天线在左旋和右旋圆极化状态的阻抗带宽为2.98~4.10 GHz,相对带宽达31.6%,轴比相对带宽达12.8%,辐射增益均大于6.8 dB;在线极化状态的相对带宽达17%以上,辐射增益均大于5.4 dB;圆极化和线极化的辐射效率均大于82%。通过对提出的超表面天线进行实物加工和测试,并对比仿真和实测结果,证明所提出的超表面天线具有较好的极化可重构功能。A polarization reconfigurable antenna design based on metasurface was proposed,which consisted of a circular tangent angle rectangular unit in the upper structure and a microstrip slit antenna in the lower structure.The polarization reconfigurability function of the metasurface antenna was analyzed by rotateing the circular tangent angle rectangular unit structure.The designed metasurface antenna is capable of three polarization modes:left-hand circular polarization,right-hand circular polarization and linear polarization in 3.20-3.64 GHz,which is interchangeable.The impedance bandwidth of the metasurface antenna is about 2.98-4.10 GHz in the left and right circular polarization states,relative bandwidth up to 31.6%,axial ratio relative bandwidth up to 12.8%,radiation gain are greater than 6.8 dB;In the linear polarization state of the relative bandwidth of more than 17%,the radiation gain are greater than 5.4 dB.Among them,the radiation efficiency of the circular polarization and linear polarization are greater than 80%.The proposed metasurface antenna was fabricated and tested,and the result was consistent with the simulation,indicating that the proposed metasurface antenna had better polarization reconfigurable function.

关 键 词：超表面 微带缝隙天线 极化可重构 圆极化 线极化 反射系数 轴比 

分 类 号：TN826[电子电信—信息与通信工程]