基于支节容性加载的小型化低剖面超表面天线  

Miniaturized low-profile metasurface antenna using capacitive loading

作　　者：隽月 车文荃[1,2] 杨琬琛 JUAN Yue;CHE Wenquan;YANG Wanchen(School of Electronic and Optical Engineering,Nanjing University of Science and Technology,Nanjing 210094;School of Electronic and Information Engineering,South China University of Technology,Guangzhou 510006)

机构地区：[1]南京理工大学电子科学与光电技术学院,南京210094 [2]华南理工大学电子与信息学院,广州510640

出　　处：《南京信息工程大学学报（自然科学版）》2019年第1期23-29,共7页Journal of Nanjing University of Information Science & Technology（Natural Science Edition）

基　　金：国家自然科学基金青年基金(61601224);江苏省自然科学基金青年基金(BK20160844)

摘　　要：本文对容性支节加载的小型化超表面天线进行了分析与设计.通过在方形贴片上引入一对容性负载支节,可以有效地降低超表面单元的工作频率,从而将传统方形贴片超表面单元的尺寸减小55%.在单元设计的基础上,设计了一款4×4阵列的超表面天线,并采用特征模分析(CMA)解释了超表面天线的辐射机制.为了验证设计思路,对天线进行了加工和测试,测量的-10 d B阻抗带宽为21. 7%,并在工作频带内保持6 d Bi的辐射增益.A miniaturized metasurface antenna using capacitive loading is investigated.First,anovel miniaturized metasurface unit cell is proposed.By introducing a pair of capacitive-loading strips inserted along the diagonal of a square patch,a size reduction of 55% can be achieved for this miniaturized unit cell.Furthermore,a compact metasurface antenna of a 4×4 array is designed using the miniaturized unit cells,which is fed by a slot structure.The radiation mechanism of the metasurface antenna is revealed and explained using a characteristic mode analysis(CMA).To validate the design,a prototype of the proposed antenna is fabricated and measurements are taken.The measured -10 dB impedance bandwidthis 21.7%,while a gain of 6 dBi is observed within the operating bandwidth.

关 键 词：超表面 小型化天线 容性加载 特征模分析 

分 类 号：TN820[电子电信—信息与通信工程]