利用科赫分形解耦的四端口紧凑型QSC UWB MIMO天线  

A Compact Four-Port QSC UWB MIMO Antenna Decoupled by Koch Fractal Branches

作　　者：苏晋荣[1] 李艳玲 SU Jinrong;LI Yanling(College of Physics and Electronic 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》2023年第2期170-177,共8页Journal of Test and Measurement Technology

摘　　要：提出一种利用共面波导(Coplanar Waveguide,CPW)馈电的四端口紧凑型准自互补(Quasi-self-complementary,QSC)超宽带(Ultra-Wideband,UWB)多输入多输出(Multiple-input Multiple-output,MIMO)天线。此UWB MIMO天线的整体尺寸为40 mm×30 mm×0.8 mm,由4个六边形准自互补辐射单元对称排列而成,印刷在介质板的一侧。介质板另一侧印刷科赫分形解耦枝节和新型正六边形双开口谐振环(double-split ring resonator,DSRR)阵列,分别提升低频和高频处天线单元间的隔离度。实验与测试结果表明,此天线的工作带宽为3.1 GHz~15.5 GHz,在大部分工作频段内,隔离度达到20 dB以上。此外,天线在整个工作频带内具有良好的辐射特性和稳定的增益。包络相关系数小于0.04,表明该天线能够很好地满足极化分集特性,可用于便携式UWB MIMO无线通信系统。In this paper,a compact four-port quasi-self-complementary(QSC)ultra-wideband(UWB)multiple-input multiple-output(MIMO)antenna fed by coplanar waveguide(CPW)is proposed.The total size of the proposed antenna is 40 mm×30 mm×0.8 mm.Four hexagonal QSC radiation elements arranged symmetrically are printed on one side of the substrate.On the other side,Koch fractal decoupled branches and a new hexagonal double-split ring resonator(DSRR)array are printed to improve the isolation between the antenna elements at low and high frequencies,respectively.The simulated and measured results show that the operating bandwidth of the antenna is 3.1 GHz to 15.5 GHz,and the isolation is more than 20 dB in most operating bands.In addition,it has good radiation characteristics and stable gain.The envelop correlation coefficient(ECC)of less than 0.04(ECC<0.04)indicates that the antenna has good diversity characteristics and can be used in portable UWB-MIMO wireless communication applications.

关 键 词：准自互补天线 科赫分形 双开口谐振环 超宽带 多输入多输出 

分 类 号：TN827.4[电子电信—信息与通信工程]