一种小型化超宽带MIMO天线设计  

A design of compact ultrawideband MIMO antenna

作　　者：吴艳杰[1] 龙云亮[1] 

机构地区：[1]中山大学电子与通信工程系,广州510006

出　　处：《电波科学学报》2016年第3期421-425,461,共6页Chinese Journal of Radio Science

基　　金：广东省研究项目(No.2014B090901057;No.2015A030312010)

摘　　要：提出了一种基于槽天线的小型化、高隔离度的超宽带（Ultra Wideband,UWB）多入多出（Multiple-Input Multiple-Output,MIMO）天线.该MIMO天线由两个槽天线单元构成,为了增加天线阻抗带宽,每个槽天线单元由末端带有圆形贴片的微带线和末端为圆形的槽线两部分耦合馈电.采用在地板上开槽和方向图分集方法,减少地板表面波和空中电磁波影响,达到提高天线隔离度的目的.数值仿真和实验结果表明：该天线在3.1～11GHz频段内满足端口反射系数｜S11｜〈-10dB,隔离度｜S12｜在7～11GHz频段内小于-25dB,在3.1～7GHz频段内小于-16dB,并根据仿真和测试S参数计算了包络相关系数.A compact ultrawideband multiple-input multiple-output（MIMO）antenna with compact and high isolation is proposed in this paper.The proposed antenna is composed of two slot antenna elements.To improve the impedance bandwidth of the MIMO antenna,these two slot antennas end with a circular shape etched on the ground plane are fed by microstriplines with one circular patch end,respectively.To obtain a high isolation,a slot is etched on the ground plane to suppress surface wave,and pattern diversity is introduced.Simulation and measurement results show that the proposed antenna has an wide impedance bandwidth of 3.1-11 GHz with｜S11｜less than-10 dB and｜S12｜less than-25 dB in 7-11 GHz,and-16 dB in 3.1-7GHz.The envelope correlation coefficient is calculated based on measured Sparameters.

关 键 词：超宽带天线 多入多出(Multiple-Input Multiple-Output MIMO)天线 高隔离度 槽天线 

分 类 号：TN958.93[电子电信—信号与信息处理]