In this paper, we propose a compact Multiple Input Multiple Output (MIMO) antenna system with high isolation for wireless applications in 5G connected devices. This MIMO antenna system with the size of consists of two elliptical antennas symmetrically arranged next to each other. Two decoupling methods which are neutralization and Defected Ground Structure (DGS) are applied to ensure diversity of the proposed MIMO antenna. The single and MIMO antennas are simulated and analyzed then fabricated and measured. A good agreement between measurements and simulations is obtained. These configurations, dedicated to covering the 3.4 GHz band -3.8 GHz, have shown very satisfactory performances more than -30 dB in terms of reduction of mutual coupling between the antennas constituting our system. MIMO diversity parameters, such as Envelope Correlation (ECC), Diversity Gain (DG), and total efficiency, are also studied for each proposed MIMO system. Thus, results demonstrate that our two proposed antenna configurations are very suitable for 5G MIMO applications.

中文翻译：

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面向具有多样性的 5G 无线应用的多路 UWB 天线系统设计

在本文中，我们为 5G 连接设备中的无线应用提出了一种具有高隔离度的紧凑型多输入多输出 (MIMO) 天线系统。这种 MIMO 天线系统的尺寸为由两个相互对称排列的椭圆形天线组成。应用中和和缺陷接地结构（DGS）两种解耦方法来确保所提出的 MIMO 天线的分集。模拟和分析单个天线和 MIMO 天线，然后制造和测量。获得了测量和模拟之间的良好一致性。这些配置专用于覆盖 3.4 GHz 频段 -3.8 GHz，在减少构成我们系统的天线之间的相互耦合方面表现出超过 -30 dB 的非常令人满意的性能。MIMO 分集参数，例如包络相关 (ECC)、分集增益 (DG) 和总效率，也针对每个提议的 MIMO 系统进行了研究。因此，