具有双陷波特性的UWB-MIMO天线  

UWB-MIMO antenna with dual band-notched characteristics

作　　者：南敬昌[1] 李文佳 高明明[1,2] NAN Jingchang;LI Wenjia;GAO Mingming(School of electronics and information engineering,Liaoning Technical University,Huludao 125105,China;School of Information Science and Technology,Dalian Maritime University,Dalian 116026,China)

机构地区：[1]辽宁工程技术大学电子与信息工程学院,葫芦岛125105 [2]大连海事大学信息科学技术学院,大连116026

出　　处：《电波科学学报》2021年第5期677-684,共8页Chinese Journal of Radio Science

基　　金：国家自然科学基金(61971210);国家自然科学基金青年科学基金(61701211);辽宁省特聘教授项目(551710007004)。

摘　　要：提出了一款具有双陷波特性的紧凑型超宽带多输入多输出(ultra wideband multiple-input multipleoutput, UWB-MIMO)天线.天线由两个辐射元件组成,整体尺寸为41 mm×25 mm×1.6 mm.通过在天线的接地平面中引入两个叠加的T型结构获得良好的隔离度;同时,通过在天线上刻蚀C型槽和U型槽实现双陷波特性,有效抑制了无线局域网(wireless local area networks, WLAN)和X波段通信卫星的干扰;并从表面电流分布的角度分析了陷波原理.实验结果表明:所设计的MIMO天线的阻抗带宽为2.8~13.4 GHz,两个陷波频带分别为4.8~5.94 GHz和6.9~8.23 GHz;在整个工作带宽内,隔离度大于15 dB.说明MIMO天线具有良好的辐射特性、稳定的增益和较低的包络相关系数(envelope correlation coefficient, ECC)(<0.1),适用于UWB-MIMO系统应用.A compact ultra-wideband MIMO antenna with dual notch characteristics is proposed. The antenna consists of two radiating elements, the overall size is 41 mm×25 mm×1.6 mm. Good isolation is achieved by introducing two superimposed T-shaped structures in the ground plane of the antenna. At the same time, by etching the C-slot and U-slot on the antenna, dual notch characteristics can be achieved, effectively suppressing interference from WLAN and X-band communication satellites. The notch principle is analyzed from the perspective of surface current distribution. Experimental results show that the impedance bandwidth of the designed MIMO antenna is 2.8-13.4 GHz,and the two notch bands are 4.8-5.94 GHz and 6.9-8.23 GHz, respectively. Within the entire operating bandwidth, the isolation is greater than 15 dB. MIMO antenna has good radiation characteristics, stable gain and very low envelope correlation coefficient(ECC <0.1), suitable for UWB-MIMO system applications.

关 键 词：超宽带(UWB) 多输入多输出(MIMO)天线 双陷波 T型去耦结构 开槽 

分 类 号：TN823.24[电子电信—信息与通信工程]