In this article, a new compact eight‐element three‐dimensional (3D) design of ultra‐wideband (UWB) multiple‐input‐multiple‐output (MIMO) antenna is proposed. For realizing polarization diversity, four elements of the MIMO antenna are oriented horizontally and four elements are arranged vertically. In the horizontal arrangement, the antenna resonating elements are placed orthogonally to each other, which reduces interelement coupling and offers a consistent link with the wireless systems/devices. The proposed antenna shows a bandwidth (S₁₁ ≤ −10 dB) of 17.99 GHz (2.83‐20.82 GHz) and isolation larger than 15 dB in the resonating band. The proposed MIMO/diversity antenna performance parameters such as envelope correlation coefficient, diversity gain, and total active reflection coefficient are evaluated and presented. Furthermore, the unit cell of the MIMO system is simulated for the packaged environment and it is observed that the antenna housing does not affect the antenna performance.

中文翻译：

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无线应用的超宽带多输入多输出/分集天线的设计和封装

本文提出了一种新的紧凑型超宽带（UWB）多输入多输出（MIMO）天线的八元素三维（3D）设计。为了实现极化分集，MIMO天线的四个元件被水平地定向并且四个元件被垂直地布置。在水平布置中，天线谐振元件彼此正交放置，这减少了元件之间的耦合并提供了与无线系统/设备的一致链接。拟议的天线显示带宽（S ₁₁ ≤-10 dB）17.99 GHz（2.83-20.82 GHz），并且在谐振频段隔离度大于15 dB。评估并提出了建议的MIMO /分集天线性能参数，例如包络相关系数，分集增益和总有源反射系数。此外，针对封装环境对MIMO系统的单位单元进行了仿真，并观察到天线外壳不会影响天线性能。