This paper presents a compact Multiple Input Multiple Output antenna with high isolation and low envelope correlation (ECC) for fifth-generation applications using spatial diversity technique. The proposed MIMO antenna consists of two single antennas, each having size of 13 × 12.8 mm², symmetrically arranged next to each other. The single and MIMO antennas are simulated and analyzed. To verify the simulated results, the prototype antennas were fabricated and measured. A good agreement between measurements and simulations is obtained. The proposed antenna covers the 28 GHz band (27.5–28.35 GHz) allocated by the FCC for 5G applications. Moreover, the isolation is more than 35 dB and the ECC is less than 0.0004 at the operating band, which means that the mutual coupling between the two elements is negligible. The MIMO parameters, such as diversity gain (DG), total active reflection coefficient (TARC), realized gain, and efficiency, are also studied. Thus, the results demonstrate that our antenna is suitable for 5G MIMO applications.

中文翻译：

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用于第五代应用的紧凑型MIMO天线中使用空间分集的高隔离度和理想相关性

本文提出了一种紧凑的多输入多输出天线，具有高隔离度和低包络相关性（ECC），适用于使用空间分集技术的第五代应用。提议的MIMO天线由两个单天线组成，每个天线的尺寸为13×12.8 mm ²，彼此对称排列。对单天线和MIMO天线进行了仿真和分析。为了验证仿真结果，制造并测量了原型天线。测量和模拟之间取得了良好的一致性。拟议中的天线覆盖了FCC为5G应用分配的28 GHz频段（27.5–28.35 GHz）。此外，在工作频段隔离度大于35 dB，ECC小于0.0004，这意味着两个元件之间的相互耦合可忽略不计。还研究了MIMO参数，例如分集增益（DG），总有源反射系数（TARC），实现的增益和效率。因此，结果表明我们的天线适用于5G MIMO应用。