A lightweight multi‐input multi‐output (MIMO) two‐element wearable ultra‐wideband (UWB) antenna having a port isolation of greater than 21 dB is introduced in this communication. The proposed structure includes wearable jeans cloth as a substrate, wherein two inverted u‐formed stubs are mounted in the middle position located on the backside of antenna and attached to the partially etched ground for enhancing the characteristics of port isolation. The developed UWB MIMO antenna has a size of 50 x 35 mm² and covers the frequency range operating from 1.83 to 13.82 GHz (~153.2%). The suggested MIMO antenna is inexpensive and functions across a broad frequency range of applications including WLAN (2.4‐2.484 GHz/5.15‐5.35 GHz/5.72‐5.825 GHz), Downlink‐uplink WiMAX (3.2‐3.85 GHz), and C‐band (3.7‐4.2 GHz/5.925‐6.425 GHz). The diversity gain (DG) is found to be greater than 9.9 along with envelope correlation coefficient (ECC) to be less than 0.059 across the entire operating bandwidth. The proposed MIMO antenna's channel power loss is bestowed to be less than 0.35 bit/s/Hz. The SAR results of the proposed UWB MIMO design admits that the antenna performs satisfactorily and is suitable for wearable applications. Simulation and testing fairly proved the output of the proposed antenna as a righteous candidate applicable for UWB MIMO applications.

中文翻译：

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用于穿戴式应用的增强型去耦UWB MIMO天线的研究和设计

此通信中引入了端口隔离度大于21 dB的轻量级多输入多输出（MIMO）两元素可穿戴超宽带（UWB）天线。所提出的结构包括可穿戴的牛仔布作为基底，其中两个倒U字形的根部安装在位于天线背面的中间位置，并连接到部分蚀刻的地面，以增强端口隔离的特性。研发的UWB MIMO天线尺寸为50 x 35 mm ²覆盖了1.83至13.82 GHz（〜153.2％）的频率范围。建议的MIMO天线价格便宜，并且可以在广泛的频率范围内工作，包括WLAN（2.4-2.484 GHz / 5.15-5.35 GHz / 5.72-5.825 GHz），下行链路-上行WiMAX（3.2-3.85 GHz）和C频段（ 3.7-4.2 GHz / 5.925-6.425 GHz）。发现在整个工作带宽上，分集增益（DG）大于9.9，包络相关系数（ECC）小于0.059。提议的MIMO天线的信道功率损耗小于0.35 bit / s / Hz。拟议的UWB MIMO设计的SAR结果表明，天线性能令人满意，并且适用于可穿戴应用。仿真和测试合理地证明了拟议天线的输出是适用于UWB MIMO应用的合理候选产品。