In this paper, a bi-directional UWB MIMO antenna is presented and investigated for superior UWB MIMO performance. The MIMO antenna elements are proved to have a typical impedance matching and directional radiation pattern over the bandwidth 3.9–10.6 GHz. The MIMO antennas have a very low mutual coupling by using efficient DGS. The MIMO antennas are evaluated for perfect MIMO performance. Results confirm that the envelope correlation coefficient (ECC) is almost lower than 0.01 over the UWB bandwidth which guarantees independent transmission/reception through MIMO system sub-channels. Moreover, spatial diversity and spatial multiplexing are proved through better than 9.8 dB diversity gain and 90% multiplexing efficiency. All simulated results are confirmed by measurements.

在本文中，提出并研究了一种双向 UWB MIMO 天线，以实现卓越的 UWB MIMO 性能。MIMO 天线元件被证明在 3.9–10.6 GHz 带宽内具有典型的阻抗匹配和定向辐射模式。MIMO 天线通过使用高效的 DGS 具有非常低的互耦合。MIMO 天线经过评估可实现完美的 MIMO 性能。结果证实，包络相关系数 (ECC) 在 UWB 带宽上几乎低于 0.01，这保证了通过 MIMO 系统子信道的独立传输/接收。此外，通过优于 9.8 dB 的分集增益和 90% 的复用效率证明了空间分集和空间复用。所有模拟结果都通过测量得到证实。