应用于LTE的高隔离度MIMO天线设计  

Design of High Isolation MIMO Antenna for LTE

作　　者：李芷嫣 韩国瑞[1] 陈新伟[1] LI Zhiyan;Han Guorui;CHEN Xinwei(College of Physics and Electronics 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》2020年第6期533-537,共5页Journal of Test and Measurement Technology

基　　金：山西省自然科学基金资助项目(201511042,2015011051);山西省“1331工程”重点学科建设计划经费资助项目(1331KSC)。

摘　　要：本文设计了一个应用于LTE的具有高隔离度的多输入多输出(MIMO)天线,由两个对称的辐射单元组成,通过在基板正反面分别印刷一个“C”形开口环,实现宽频带.为了提高天线端口之间的隔离度,在基板背面的接地板上引入一个T形槽来减小工作频带内较高频段的耦合,另外在基板背面T型槽内插入一个谐振枝节来减小工作频带内较低频段的耦合.仿真结果表明,天线的工作频带范围为1.66 GHz^3.08 GHz(59.9%).天线两个端口之间的隔离度在整个宽频带内达到20 dB以上,满足LTE-MIMO天线的设计要求.A Multiple-Input Multiple-Output(MIMO)antenna is designed with high isolation for LTE application.It is composed of two symmetrical radiating elements.The“C”shaped split rings is printed on the front and back of substrate to achieve broadband.In order to improve the isolation between the antenna ports,a T-slot is introduced on the ground plate on the back of the substrate to reduce the coupling of higher frequency.A resonant branch is inserted in the T-slot on the back of the substrate to reduce the coupling in lower frequency bands.Simulation results show that the antenna can operate at the frequency range of 1.66 GHz^3.08 GHz(59.9%).The isolation between the two ports of the antenna reaches more than 20 dB in the whole band,which meets the design requirements of LTE-MIMO antennas.

关 键 词：多输入多输出 LTE T形槽 隔离度 去耦 

分 类 号：TN828.6[电子电信—信息与通信工程]