具有阻带特性的超宽带MIMO天线设计  

Design of Ultra-Wideband MIMO Antenna with Band-Notched Characteristic

作　　者：李若萌 杜成珠 杨福慧 LI Ruomeng;DU Chengzhu;YANG Fuhui(College of Electronics and Information Engineering,Shanghai University of Electric Power,Shanghai 200082,China;CETC Shanghai Microwave Communication CO.,Ltd.,Shanghai 200000,China)

机构地区：[1]上海电力大学电子与信息工程学院,上海200082 [2]中电科微波通信(上海)有限公司,上海200000

出　　处：《压电与声光》2023年第5期785-790,共6页Piezoelectrics & Acoustooptics

摘　　要：根据通信系统中对超宽带传输的要求,设计了一种基于共面波导馈电(CPW)的高隔离度二阻带超宽带多输入多输出(MIMO)槽天线。天线由两个正交放置的辐射贴片组成,印制在FR4介质基板上,辐射贴片为矩形与半圆形相结合的渐变形结构。在辐射贴片处刻蚀C形槽,以及在辐射贴片背部加载开口谐振环(SRR),可抑制WLAN和X波段的干扰。通过引入栅栏形枝节,提高了MIMO天线的隔离度。实测结果表明,该天线工作带宽为3.00~10.66 GHz,此范围内端口隔离度S_(21)均低于-27 dB,在5.11~5.96 GHz和6.82~7.86 GHz处具有阻带特性,包络相关系数(ECC)均小于0.03,可应用于需要抑制多个窄带信号干扰的超宽带MIMO通信系统。According to the requirements for ultra-wideband transmission in communication systems,a high isolation dual band-notched ultra-wideband(UWB)multiple-input-multiple-output(MIMO)slot antenna with coplanar waveguide(CPW)feed was designed in this paper.The antenna printed on a FR4 dielectric substrate consists of two orthogonally placed radiation patches,which are a gradual structure combining rectangular and semicircle shapes.The interferences of WLAN and X-band were suppressed by etching C-slot on the radiation patch and loading SRR branch on the back of the radiation patch.The isolation of the proposed MIMO antenna is improved by introducing a fence-shaped branch.The measured results show that the operating bandwidths of the antenna is 3.0-10.66 GHz,the port isolation(S_(21))within this range is less than-27 dB.The antenna has notched-band characteristics at 5.11-5.96 GHz and 6.82-7.86 GHz.The envelope correlation coefficient(ECC)is less than 0.03.The antenna can be applied to the UWB MIMO communication systems requiring suppression of interference from multiple narrowband signals.

关 键 词：超宽带 CPW 二阻带 隔离度 开口谐振环(SRR) 栅栏形隔离枝节 

分 类 号：TN82[电子电信—信息与通信工程]