一种双频MIMO天线的T型枝节解耦设计  

Decoupling Design of a Dual-band MIMO Antenna with T Shape Branches

作　　者：张娟 张心怡 吴晓丽 裴立力[1] 李莉[1] 韩国瑞[1] ZHANG Juan;ZHANG Xinyi;WU Xiaoli;PEI Lili;LI Li;HAN Guorui(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2期170-175,共6页Journal of Test and Measurement Technology

基　　金：国家自然科学基金资助项目(61771295,61775126);山西省自然科学基金资助项目(201901D111026,201901D111027);山西省“1331工程”重点学科建设资助项目(1331KSC);山西大学第十八期本科生科研训练计划资助项目(202018293)。

摘　　要：本文设计了一种T型枝节解耦的双频MIMO天线.两个工作频段分别覆盖WLAN频率2.45 GHz/5.2 GHz/5.8 GHz.低频谐振单元为倒F天线,通过在低频枝节上增加短截线,用以产生高频谐振,实现双频工作.将天线单元沿水平方向对称放置形成二单元的MIMO天线,并采用在两个天线单元之间添加T型枝节的方法进行解耦.对所设计的天线进行仿真,其隔离度在工作频段内均高于25 dB.测试结果表明,天线隔离度在工作频段内高于27.5 dB可实现稳定的全向辐射性能.This paper designs a dual-band MIMO antenna with T shape branches.Its two operating frequency bands cover the WLAN 2.45 GHz/5.2 GHz/5.8 GHz,respectively.The low-frequency resonance element is an inverted-F antenna.The high-frequency resonance is generated and dual bands are achieved by adding a stub on the low-frequency branch.Two antenna units are placed symmetrically in the horizontal direction to form a two-unit MIMO antenna.Decoupling is achieved by adding T-shaped stubs between two antenna elements.The simulation results show that the isolation of the proposed antenna is exceeded 25 dB in the operating band.The measurement results show that stable omnidirectional radiation performance can be achieved when the antenna isolation exceeds 27.5 dB in the operating frequency band.

关 键 词：MIMO天线 枝节解耦 双频 隔离度 

分 类 号：TN821+.3[电子电信—信息与通信工程]