This paper numerically proposes and experimentally investigates a compact coplanar waveguide fed two element ultra-wideband (UWB), multiple-input–multiple-output (MIMO) antenna array accompanying peak isolation and triple band notch mechanism. The proposed antenna consists of two identical printed monopole elements along with the incorporation of multiple 2nd order Hilbert defects in the ground structure and proposes to incorporate three different mechanisms to reduce the electromagnetic interference of the UWB antenna with existing narrowband systems. The measured impedance bandwidth for the intended antenna ranges from 2.7 GHz to 11.22 GHz. The incorporation of notch mechanisms provides interference suppression at the C-band (3.7–4.2 GHz), WLAN (5.15–5.825 GHz), and X-band communication (7.9–8.4 GHz). The overall size of the intended UWB MIMO antenna is 30.75 mm × 37.80 mm. Moreover, the diversity parameters of the proposed UWB MIMO antenna are numerically calculated and empirically investigated, these calculations and investigations depicts high diversity performance. It is noteworthy to observe that the spacing between the elements is staggeringly reduced to 2 mm. The concurrence among the diverse numerical and experimental outcomes supports the candidature of the suggested layout for portable UWB as well as UWB MIMO systems.

本文通过数值方法提出并通过实验研究了紧凑的共面波导馈电的两元件超宽带（UWB），多输入多输出（MIMO）天线阵列以及峰值隔离和三频陷波机制。拟议中的天线由两个相同的印刷单极子元素组成，并在地面结构中引入了多个二阶希尔伯特缺陷，并提出了三种不同的机制来减少UWB天线对现有窄带系统的电磁干扰。预期天线的测量阻抗带宽范围为2.7 GHz至11.22 GHz。陷波机制的加入可在C频段（3.7–4.2 GHz），WLAN（5.15–5.825 GHz）和X频段通信（7.9–8.4 GHz）处提供干扰抑制。预期的UWB MIMO天线的整体尺寸为30.75 mm×37.80 mm。此外，对所提出的UWB MIMO天线的分集参数进行了数值计算和实证研究，这些计算和研究表明了高分集性能。值得注意的是，元件之间的间距惊人地减小到2 mm。各种数值和实验结果之间的一致性支持了针对便携式UWB以及UWB MIMO系统的建议布局的候选资格。值得注意的是，元件之间的间距惊人地减小到2 mm。各种数值和实验结果之间的一致性支持了便携式UWB以及UWB MIMO系统的建议布局的候选资格。值得注意的是，元件之间的间距惊人地减小到2 mm。各种数值和实验结果之间的一致性支持了便携式UWB以及UWB MIMO系统的建议布局的候选资格。