基于超材料的超宽带MIMO天线设计  

Ultra-Wideband MIMO Antenna Design Based on Metamaterials

作　　者：代兆国 韩波 刘秋雨 DAI Zhaoguo;HAN Bo;LIU Qiuyu(School of Computer and Information Engineering,Fuyang Normal University,Fuyang 236037,China)

机构地区：[1]阜阳师范大学计算机与信息工程学院,安徽阜阳236037

出　　处：《安庆师范大学学报(自然科学版)》2024年第4期43-47,共5页Journal of Anqing Normal University(Natural Science Edition)

基　　金：安徽省自然科学基金面上项目(2008085MF215);安徽省高等学校科学研究重大项目(2022AH040198)。

摘　　要：本文提出了一种新型超材料,同时利用S参数反演法和MATLAB相结合的方法来提取超材料的等效电磁参数,并验证了超材料的磁负特性。同时,设计了一个超宽带MIMO天线,通过加载T型接地枝节的方法来扩展了天线的带宽,并使天线在带宽范围内的隔离度都小于-17dB。通过在馈线旁放置超材料,并在天线贴片上方刻蚀开口向上的开口环结构,以及在下方刻蚀开口向下的开口环结构,分别实现了3.29~3.89 GHz、4.82~5.93 GHz和7.88~8.77 GHz三个频段的陷波,抑制了WiMAX、WLAN和X波段上行频率的干扰。所设计的天线尺寸仅为30 mm×30 mm×0.8 mm,且性能良好,具有一定的应用价值。A new type of metamaterial is proposed,where the equivalent electromagnetic parameters of metamaterial are extracted by S-parameter inversion method in MATLAB,and the magnetic negative characteristics are verified.Concurrently,an ultra-wideband MIMO antenna is designed.The bandwidth of the antenna is extended by loading a T-shaped grounded branch,and the isolation in the bandwidth range of the antenna is less than-17 dB.Metamaterials are placed adjacent to the feeder,with etched open-loop structure facing upwards on the antenna patch,and downwards on the bottom of the antenna patch,achieving notches at 3.29 to 3.89 GHz,4.82 to 5.93 GHz and 7.88 to 8.77 GHz,thereby suppressing the impact of uplink frequency of WiMAX,WLAN and X-band.The designed antenna size is only 30 mm×30 mm×0.8 mm,which has good performance and significant application value.

关 键 词：MIMO天线 超材料 超宽带 T型接地枝节 

分 类 号：TN826[电子电信—信息与通信工程]