CPW馈电的高隔离度一阻带UWB-MIMO天线设计  

Design of high isolation single band-notch UWB-MIMO antenna with coplanar waveguide feed

作　　者：李碧珂 杜成珠 杨福慧 杨志鹏 程启明 Li Bike;Du Chengzhu;Yang Fuhui;Yang Zhipeng;Cheng Qiming(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,上海200082 [2]中电科微波通信(上海)有限公司,上海200000

出　　处：《电子测量与仪器学报》2022年第12期193-199,共7页Journal of Electronic Measurement and Instrumentation

基　　金：国家自然科学基金(61704103)项目资助

摘　　要：针对目前超宽带多输入多输出(ultra wideband multiple-input multiple,UWB-MIMO)天线仍存在的尺寸大、端口隔离不够高、抗干扰能力弱等缺陷,设计了一款使用共面波导馈电(coplanar waveguide feed,CPW)馈电的小型化具有陷波特性的UWB-MIMO缝隙天线,通过将方形辐射贴片切角来拓宽带宽,两天线单元地板互联,并在天线单元间增加栅栏形解耦枝节来提高天线的隔离度。天线尺寸仅为30 mm×56 mm×0.8 mm。此外,在方形辐射贴片上刻蚀了开口谐振环(split ring resonator,SSR)结构的C形槽,可滤除WLAN频段信号(5.15~5.85 GHz)对UWB系统的干扰。天线的实测结果表明,该天线工作频段为2.73~10.71 GHz,端口隔离度小于-20 dB,包络相关系数ECC<0.01。实验结果表明该天线适用于UWB-MIMO通信系统。In order to improve the defect of UWB-MIMO antenna,such as large size,insufficient port isolation and weak anti-interference ability,a miniaturized UWB-MIMO slot antenna with notch characteristics fed by coplanar waveguide(CPW)is proposed,which cutting the square radiation patch to broaden the bandwidth,by connecting the two antenna unit coplanar ground and adding fence shaped decoupling branches between the antenna units,the isolation of the antenna is improved.The antenna size is only 30 mm×56 mm×0.8 mm.In addition,a C-slot open resonator ring(SSR)structure is etched on the square radiation patch to filter the interference of WLAN band signals(5.15~5.85 GHz)to the UWB system.The measured results of the antenna show that the working frequency band of the antenna is 2.73~10.71 GHz,the port isolation is less than-20 dB,and the envelope correlation coefficient ECC is less than 0.01.It shows that the antenna is suitable for UWB-MIMO communication system.

关 键 词：超宽带天线 共面波导馈电 缝隙天线 陷波 MIMO天线 栅栏形枝节 小型化 

分 类 号：TN822.8[电子电信—信息与通信工程]