In this communication, a low-cost four/eight-element MIMO antenna is proposed for Wi-MAX (IEEE 802.16d) and 5G applications band. A reverse U-shaped slot is introduced in the radiated structure to resonate the antenna in lower resonating bands. The Antenna covers the measured frequency range from 3.45 GHz to 3.55 GHz. An Electromagnetic coupling among the four/eight MIMO elements affects the overall MIMO system. To minimize the coupling between antenna elements, a multiple dumb-bell shaped parasitic element is inserted between the MIMO radiating elements. Due to that, the inter isolation is achieved by nearly −18 dB. Apart from the isolation, the other MIMO performance is widely investigated using Ansys HFSS and CST Microwave studio electromagnetic software. The MIMO antenna diversity parameters like ECC and D.G. of the proposed eight-element is calculated using radiation parameter method and found < 0.36 and > 9.5 respectively. The proposed four-element and eight-element of MIMO antenna occupies a place of 70 × 75.5 mm² and 69 × 144 mm², respectively. The prototype is fabricated on low-cost FR-4 substrate using MITS eleven lab and measured using Rohde & Schwarz ZVL vector network analyzer. The simulated and measured results show good matching between them.

在该通信中，针对 Wi-MAX (IEEE 802.16d) 和 5G 应用频段提出了一种低成本的四/八元件 MIMO 天线。在辐射结构中引入了一个倒 U 形槽，使天线在较低的谐振频带内谐振。天线覆盖了从 3.45 GHz 到 3.55 GHz 的测量频率范围。四个/八个 MIMO 元件之间的电磁耦合会影响整个 MIMO 系统。为了最大限度地减少天线元件之间的耦合，在 MIMO 辐射元件之间插入了多个哑铃形寄生元件。因此，实现了接近 -18 dB 的内部隔离。除了隔离之外，还使用 ​​Ansys HFSS 和 CST Microwave studio 电磁软件广泛研究了其他 MIMO 性能。ECC 和 DG 等 MIMO 天线分集参数 使用辐射参数方法计算了所提出的八元素的 ，发现分别 < 0.36 和 > 9.5。所提出的四元和八元 MIMO 天线占据 70 × 75.5 mm 的位置²和 69 × 144 mm ²，分别。该原型是使用 MITS 11 实验室在低成本 FR-4 基板上制造的，并使用罗德与施瓦茨 ZVL 矢量网络分析仪进行测量。模拟结果和实测结果表明它们之间具有良好的匹配性。