In this paper, four-element Multiple-Input Multiple-Output (MIMO) antenna system has been proposed for Intelligent Internet of Everything (IIoE) and high-speed data applications. The presented antenna design operates at 4.9 GHz (5G millimeter wave applications) with high isolation in a small size. Defected Microstrip Structure (DMS), slot modification and orthogonal polarization are used to generate the desired frequency band, improve the impedance bandwidth, and enhance the isolation between antenna elements at 4.9 GHz, respectively. Furthermore, the usefulness of the proposed MIMO antenna has been verified by comparing the simulated and the measured results using a fabricated version of the considered 4 × 4 MIMO antenna. In addition, the results indicate a high diversity performance in terms of: Envelope Correlation Coefficient (ECC), Diversity Gain (DG), Efficiency, Gain, Total Active Reflection Coefficient (TARC) and Total Channel Capacity Loss (CCL_Total).

本文提出了四元件多输入多输出（MIMO）天线系统，用于智能万物互联（IIoT）和高速数据应用。所提出的天线设计工作频率为 4.9 GHz（5G 毫米波应用），具有小尺寸、高隔离度。缺陷微带结构 (DMS)、缝隙修改和正交极化分别用于生成所需频带、改善阻抗带宽并增强 4.9 GHz 天线元件之间的隔离度。此外，通过使用所考虑的 4 × 4 MIMO 天线的制造版本比较仿真结果和测量结果，验证了所提出的 MIMO 天线的实用性。此外，结果表明在以下方面具有较高的分集性能：包络相关系数 (ECC)、分集增益 (DG)、效率、增益、总有源反射系数 (TARC) 和总通道容量损失 (CCL _Total )。