An eight element, compact Ultra Wideband– Multiple Input Multiple Output (UWB-MIMO) antenna capable of providing high data rates for future Fifth Generation (5G) terminal equipments along with the provision of necessary bandwidth for Third Generation (3G) and Fourth Generation (4G) communications that accomplishes band rejection from 4.85 to 6.35 GHz by deploying a Inductor Capacitor (LC) stub on the ground plane is presented. The incorporated stub also provides flexibility to reject any selected band as well as bandwidth control. The orthogonal placement of the printed monopoles permits polarization diversity and provides high isolation. In the proposed eight element UWB-MIMO/diversity antenna, monopole pair 3–4 are 180° mirrored transform of monopole pair 1–2 which lie on the opposite corners of a planar $50\times50$ mm ² substrate. Four additional monopoles are then placed perpendicularly to the same board leading to a total size of $50\times 50\times25$ mm ³ only. The simulated results are validated by comparing the measurements of a fabricated prototype. It was concluded that the design meets the target specifications over the entire bandwidth of 2 to 12 GHz with a reflection coefficient better than −10 dB (except the rejected band), isolation more than 17 dB, low envelope correlation, low gain variation, stable radiation pattern, and strong rejection of the signals in the Wireless Local Area Network (WLAN) band. Overall, compact and reduced complexity of the proposed eight element architecture, strengthens its practical viability for the diversity applications in future 5G terminal equipments amongst other MIMO antennas designs present in the literature.

中文翻译：

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具有3G / 4G / 5G通信的WLAN带宽抑制功能的八元素紧凑型UWB-MIMO /多样性天线

八元素紧凑型超宽带多输入多输出（UWB-MIMO）天线，能够为未来的第五代（5G）终端设备提供高数据速率，并为第三代（3G）和第四代提供必要的带宽（本文介绍了通过在接地平面上部署一个电感电容器（LC）短截线来实现从4.85 GHz到6.35 GHz的带宽抑制的4G通信。内置的存根还提供了拒绝任何选定频带以及带宽控制的灵活性。印刷单极子的正交放置允许极化分集并提供高隔离度。在拟议的八元UWB-MIMO /分集天线中，单极对3-4是单极对1-2的180°镜像变换，它们位于平面的相对角上 $ 50 \次50 $ 毫米 ²基板。然后，将四个其他单极子垂直于同一板放置，从而导致总尺寸为 $ 50 \次50 \次25 $ 仅mm ³。通过比较制造的原型的测量结果来验证仿真结果。结论是，该设计在2至12 GHz的整个带宽上均满足目标规格，反射系数优于-10 dB（拒绝频带除外），隔离度高于17 dB，低包络相关性，低增益变化，稳定辐射模式，以及对无线局域网（WLAN）频段中信号的强烈抑制。总体而言，拟议中的八元架构的紧凑性和降低的复杂性增强了其在未来5G终端设备以及文献中介绍的其他MIMO天线设计中的分集应用中的实际可行性。