一种小型化的高隔离度UWB-MIMO天线

A miniaturized high isolation UWB-MIMO antenna

摘要: 提出了一种紧凑、高性能、形状新颖的具有高隔离度的超宽带多输入多输出(ultra-wideband multiple-input multiple-output, UWB-MIMO)天线. 天线由两个圆形辐射元件组成，享有共同的类F形接地平面，尺寸为30 mm×18 mm. 在天线的接地平面中引入类F形短截线，在MIMO天线元件之间产生高度隔离. 所设计的UWB-MIMO天线具有极低耦合(S₂₁<−22 dB)、低包络相关系数 (ECC<0.003)、高分集增益 (DG>9.98 dB)，适用于便携式通信设备.

Abstract: A compact, high performance, and novel-shaped ultra-wideband (UWB) multiple-input multiple-output (MIMO) antenna with low mutual coupling is presented in this paper. The proposed antenna consists of two circular radiating elements with shared ground plane with an area of 30 mm×18 mm. F-shape stubs are introduced in the shared ground plane of the proposed antenna to produce high isolation between the MIMO antenna elements. The designed MIMO antenna has very low mutual coupling (S₂₁ <−22 dB), low envelope correlation coefficient (ECC < 0.003), high diversity gain (DG > 9.98 dB), which is suitable for UWB-MIMO system applications.