差分高隔离MIMO天线的设计  

Design of Differential MIMO Antenna with High Isolation

作　　者：耿彦峰[1] 秦嘉华 宋杰 韩国瑞[1] GENG Yanfeng;QIN Jiahua;SONG Jie;HAN Guorui(School of Physics & 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5期446-450,共5页Journal of Test and Measurement Technology

基　　金：国家自然科学基金资助项目(61172045,61271160);山西省自然科学基金资助项目(2014021021-1,2015011042,2015011051);山西大学第十七期本科生科研训练计划资助项目(2019017280)。

摘　　要：本文设计了一种具有差分馈电的高隔离度四端口多输入多输出(MIMO)天线.天线的辐射单元由一个十字型贴片和一个方形环贴片两部分嵌套而成.天线两个贴片分别采用不同的馈电方式,十字型贴片采用微带转探针馈电;方形环贴片采用T型功分器和微带线的差分馈电网络馈电.天线中心频率均为2.42 GHz,带宽均大于45 MHz.为了改善天线的隔离度,在天线的端口之间增加了中和线.仿真结果显示,采用本文的设计方法,天线单元间的隔离度改善了12.1 dB,天线单元间的互耦在天线工作频段内均低于-25.6 dB.This work proposed a novel four ports multiple-input-multiple-output(MIMO)antenna with differential ports.The radiation elements of the antenna consists of a cross patch and a square ring patch.The two patches of the antenna are adopted different feeding methods,the cross-shaped patch uses microstrip to probe feeding,the square ring patch uses a T-type power splitter and a microstrip differential feed network.The center frequency of the antenna is 2.42 GHz and the bandwidth is greater than 45 MHz.Two neutralization lines for improving the isolation are added between the ports of the proposed antenna.Simulation results show that the isolation is improved by 12.1 dB and the mutual coupling between the antenna elements is less than minus 25.6 dB in the antenna operating frequency range.

关 键 词：多输入多输出天线 互耦 差分馈电 中和线 包络相关系数 

分 类 号：TN823.24[电子电信—信息与通信工程]