超宽带MIMO印刷单极子天线的设计

Design of UWB MIMO Printed Monopole Antenna

为了适应UWB系统对天线小型化的需求,设计了一款紧凑型UWB-MIMO天线,天线尺寸仅为23 mm×31 mm×1.6 mm。通过引入阶梯状结构,极大改善了天线带宽。测试结果显示所设计的UWB-MIMO天线的阻抗带宽为2.9~28 GHz,带宽比为9.6∶1。整个频段内互耦程度小于-15 d B,中高频段小于-20 d B,很好地满足了UWB系统对MIMO天线带宽和互耦程度的要求。在此基础上,对地板进行改造,实现了天线的双陷波特性。

In order to meet the requirement of antenna miniaturization for MIMO system,the design of a compact UWB-MIMO antenna is proposed,and the antenna size is only 23 mm×31 mm×1.6 mm.By introducing the stepped structure,the antenna bandwidth is greatly improved,and the test results show that the impedance bandwidth of the de-signed UWB-MIMO antenna is 2.9-28 GHz,and the bandwidth ratio is 9.6∶1.The degree of mutual coupling in the whole frequency band is less than-15 dB,and the degree of mutual coupling in the middle and high frequency bands is less than-20 dB,which well meets the requirements of the MIMO system for antenna bandwidth and isolation.And on this basis,through the improvement of the floor,the dual band-notched feature of the antenna is realized.