In this article, cross-shaped metallic parasitic strips based two radiator element multiple-input multiple-output (MIMO) dielectric resonator antenna (DRA) is excited by quadrature wave transformer microstrip feedline, designed, simulated and fabricated for ultra-wideband (UWB) applications. The proposed MIMO antenna structure is implemented with the help of two rectangular-shaped radiator elements that supports three modes HE 11 δ , HE 21 δ , and HE 12 δ at 4.4, 8.3, 10.8 GHz respectively. These fundamental and higher-order modes are supported to wide impedance bandwidth. Inverted T-shaped metallic strip and ground stub to improve the impedance bandwidth 104.6% (3.3–10.8 GHz) with 5.7 dBi peak gain, to enhance the coupling coefficient by stub, scissor-shaped defected ground structure and cross-shaped metallic parasitic strips are used in the existed structure. The MIMO diversity parameters are implemented as simulated ECC ≤ 0.003, DG ≥ 9.98 dB, and CCL ≤ 0.68. All the obtained MIMO antenna parameters are within the acceptable limit for providing high data rate for UWB applications.

中文翻译：

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基于紧凑十字形寄生带的多输入多输出（MIMO）介质谐振器天线，用于超宽带（UWB）应用

在本文中，通过正交波变换器微带馈线激发基于十字形金属寄生带的两个辐射器元件多输入多输出（MIMO）介质谐振器天线（DRA），为超宽带（UWB）设计，仿真和制造应用程序。借助于两个矩形辐射器元件来实现所提出的MIMO天线结构，所述两个矩形辐射器元件分别在4.4、8.3、10.8GHz处支持三种模式HE 11δ，HE 21δ和HE 12δ。支持这些基本模式和高阶模式，以实现宽阻抗带宽。倒T形金属带和接地短截线可将阻抗带宽提高104.6％（3.3–10.8 GHz），峰值增益为5.7 dBi，从而通过短截线增强耦合系数，现有结构采用剪状缺陷接地结构和十字形金属寄生带。MIMO分集参数实现为模拟ECC≤0.003，DG≥9.98 dB和CCL≤0.68。所有获得的MIMO天线参数均在可接受的范围内，可以为UWB应用提供高数据速率。