In this proposed research article, four-port dual notched bands multiple-input-multiple-output (MIMO) antenna configuration is proposed and is experimentally investigated by fabricating prototype. Initially, a single element is fabricated which is converted to 2 × 2 MIMO configuration and finally to 4 × 4 MIMO configuration. The proposed MIMO antenna is designed to cover impedance bandwidth of 3.15–11.36 GHz and hence is useful in applications for ultrawideband and X-Band applications. Two interfering bands, WiMAX (3.30–4.05 GHz) and WLAN (4.90–5.99 GHz) are eliminated by using an inverted T-shaped stub and C-shaped slot on the radiating patch of the MIMO antenna. The proposed MIMO antenna offers good diversity performance with envelope correlation coefficient < 0.02, directive gain > 9.95 dB and total active reflection coefficient ≤ 20 dB in the entire operating band. Also, antenna gain is stable in the entire operating band except in interfering bands with a maximum radiation efficiency of more than 80% and stable radiation pattern. All the above said features make the proposed antenna suitable for high-speed wireless network applications.

在这篇拟议的研究文章中，提出了四端口双陷波带多输入多输出（MIMO）天线配置，并通过制造原型进行了实验研究。最初，制造单个元件，然后将其转换为2×2 MIMO配置，最后转换为4×4 MIMO配置。提议的MIMO天线旨在覆盖3.15–11.36 GHz的阻抗带宽，因此可用于超宽带和X波段应用。通过在MIMO天线的辐射贴片上使用倒T形短截线和C形缝隙，可以消除WiMAX（3.30–4.05 GHz）和WLAN（4.90–5.99 GHz）这两个干扰带。提出的MIMO天线具有良好的分集性能，包络相关系数<0.02，方向增益> 9。在整个工作频段内，其总反射率为95 dB，总有效反射系数≤20 dB。而且，天线增益在整个工作频带中都是稳定的，除了在干扰频带中具有最大80％以上的最大辐射效率和稳定的辐射方向图。所有上述特征使所提出的天线适合于高速无线网络应用。