This study presents a novel configuration of a cuboidal quad-port ultra-wideband multiple-input and multiple-output antenna with WLAN rejection characteristics. The designed antenna consists of four F-shaped elements backed by a partial ground plane. A 50 Ω microstrip line is used to feed the proposed structure. The geometry of the suggested antenna exhibits an overall size of 23 × 23 × 19 mm3, and the antenna produces an operational bandwidth of 7.6 GHz (3.1–10.7 GHz). The notched band characteristic at 5.4 GHz is accomplished by loading a pair of spiral electromagnetic bandgap structures over the ground plane. Besides this, other diversity features such as envelope correlation coefficient, and diversity gain are also evaluated. Furthermore, the proposed antenna system provides an isolation of −15 dB without using any decoupling structure. Therefore, to validate the reported design, a prototype is fabricated and characterized. The overall simulated performance is observed in very close agreement with it's measured counterpart.

本研究提出了一种具有 WLAN 抑制特性的长方体四端口超宽带多输入多输出天线的新颖配置。设计的天线由四个 F 形元件组成，由一个部分接地平面支持。一条 50 Ω 微带线用于为建议的结构供电。建议天线的几何形状显示整体尺寸为 23 × 23 × 19 mm 3, 天线产生 7.6 GHz (3.1–10.7 GHz) 的工作带宽。5.4 GHz 的陷波带特性是通过在接地平面上加载一对螺旋电磁带隙结构来实现的。除此之外，还评估了其他分集特征，例如包络相关系数和分集增益。此外，所提出的天线系统在不使用任何去耦结构的情况下提供 -15 dB 的隔离。因此，为了验证报告的设计，制作了一个原型并进行了表征。观察到的整体模拟性能与其测量的对应物非常接近。