一种改善超宽带MIMO天线隔离性能的方法  

A Novel Method for Improving Isolation of UWB MIMO Antenna

作　　者：韩国瑞[1] 方子皓 李莉[1] 田海琴 裴立力[1] HAN Guorui;FANG Zihao;LI Li;TIAN Haiqin;PEI Lili(College of Physics and Electronic Engineering, Shanxi University, Taiyuan 030006, China)

机构地区：[1]山西大学物理电子工程学院,山西太原030006

出　　处：《测试技术学报》2021年第1期84-87,共4页Journal of Test and Measurement Technology

基　　金：国家自然科学基金资助项目(61172045,61271160);国家基础科学人才培养基金资助项目(J1103210);山西省自然科学基金资助项目(2015011042,2015011051,201901D111026,201901D111027);山西大学第十八期本科生科研训练计划资助项目(202018293)。

摘　　要：多输入多输出(Multiple-Input Multiple-Output,MIMO)技术是现代通信技术的发展趋势,为移动通信的迅速更迭提供了极大支持.设计了一种二端口的超宽带MIMO天线,其-10 dB阻抗带宽从3.3 GHz扩展到9.1 GHz.通过在天线接地板上蚀刻一条宽缝隙,并在其中添加音叉型枝节,改善了超宽带MIMO天线端口间的隔离特性.仿真结果表明,采用缺陷地结构可使得天线在工作频带2.9 GHz~9.8 GHz内,其隔离度均大于-19.3 dB.Multiple-input multiple-output(MIMO)technology is the development trend of modern communication technology,which provides great support for the rapid mobile changes.In this paper,the isolation of a novel ultra wideband(UWB)MIMO antenna is studied and improved.The-10 dB impedance bandwidth is expended from 3.3 GHz to 9.1 GHz.Through cutting a wide slot on the antenna ground plate and then adding a fork-branch on the ground,the isolation between the ports of the ultra-wideband MIMO antenna can be obviously improved.The simulated results show that the impedance bandwidth is from 2.9 GHz to 9.8 GHz and the isolation is more than-19.3 dB in the operating band with the defected ground structure(DGS).

关 键 词：多输入多输出 超宽带天线 隔离度 缺陷地结构 

分 类 号：TN823.24[电子电信—信息与通信工程]