超宽带单陷波四元MIMO天线的设计

Design of Four-Element UWB-MIMO Antenna with Single Notched Band

该文设计了一款具有单陷波特性的高隔离超宽带(UWB)四单元多输入多输出(MIMO)天线。天线的尺寸为65 mm×65 mm×0.8 mm。4个槽天线单元水平正交放置,采用易加工集成的共面波导(CPW)馈电,引入缺陷地及十字隔离枝节去耦。通过在天线辐射贴片上刻蚀一个U形槽,在4.35~6.08 GHz处产生陷波,能阻止WLAN(5.15~5.825 GHz)的通信干扰。经实测,该天线的工作频段为2.46~10.6 GHz,隔离度<-20 dB,在4.35~6.08 GHz产生覆盖WLAN的阻带,包络相关系数<0.02,分集增益>9.998,实测性能良好。该天线能够广泛应用于UWB-MIMO通信系统。

This study presents the design of a high-isolation ultra-wideband(UWB)four-element multiple input multiple output(MIMO)antenna with a single notched band.The dimensions for this antenna are 65 mm×65 mm×0.8 mm.The four slot antenna units are placed horizontally and orthogonally,and the antenna is fed by a coplanar waveguide,facilitating ease of manufacture and integration.The defect ground and cross isolation branches are used for decoupling.Furthermore,a U-shaped slot is etched on the antenna radiation patch to create a notched band at 4.35-6.08 GHz,which effectively suppresses WLAN communication interference(5.15-5.825 GHz).The measured operating band of the proposed antenna is 2.46-10.6 GHz,with an isolation level of less than-20 dB.The notched band is generated at 4.35-6.08 GHz,which effectively suppresses the WLAN interference.Additionally,the envelope correlation coefficient is maintained below 0.02,and the diversity gain exceeds 9.998.The measured performance is robust,demonstrating significant potential for extensive application in UWB-MIMO communication systems.