This manuscript proposed a compact four-port multiple input multiple output (MIMO) antenna based on four split-ring resonators (SRR) at the top and a defected ground structure (DGS) at the bottom of the substrate for 5G communication. SRRs are used to resonate at 4 GHz frequency in mid-5G band. A slot of “ + ” symbol is cut at the bottom (DGS) to enlarge the bandwidth. The proposed antenna also achieved a high-5G frequency band (26.8–29.8 GHz) (n257/n258 band) by four square-shaped ring slots at the ground plane. It further enhances the bandwidth in mid-5G band (2.9–6 GHz) (n74/n75/n76/n77/n78 band) and helps to achieve a high degree of isolation between each radiating element (over 40 dB) at both the 5G bands. The size of the proposed MIMO antenna is 60 mm × 60 mm × 1.6 mm. It achieves a maximum gain of 4.59 dB, 4.32 dB at the mid-5G and high-5G band, respectively. The maximum radiation efficiencies achieved are 89%, 81% at the mid-5G and high-5G band, respectively. The diversity functionality of the antenna is also outstanding as the value of ECC is 0.01–0.42, DG is 9.6–10 dB, and TARC is less than − 10 dB measured in both the bands. The entire performance of the proposed antenna is practically verified, discussed and presented.

该手稿提出了一种紧凑型四端口多输入多输出 (MIMO) 天线，基于顶部的四个裂环谐振器 (SRR) 和基板底部的缺陷接地结构 (DGS)，用于 5G 通信。SRR 用于在中 5G 频段的 4 GHz 频率下谐振。底部（DGS）切有一个“+”符号的槽，以扩大带宽。所提出的天线还通过接地平面上的四个方形环槽实现了高 5G 频段（26.8-29.8 GHz）（n257/n258 频段）。它进一步增强了中 5G 频段 (2.9–6 GHz)（n74/n75/n76/n77/n78 频段）的带宽，有助于在 5G 和 5G 频段下实现每个辐射元件之间的高度隔离（超过 40 dB）乐队。所提出的 MIMO 天线尺寸为 60 mm × 60 mm × 1.6 mm。它在中5G和高5G频段分别实现了4.59 dB和4.32 dB的最大增益。在中5G和高5G频段实现的最大辐射效率分别为89%和81%。天线的分集功能也非常出色，在两个频段中测得的 ECC 值为 0.01–0.42，DG 为 9.6–10 dB，TARC 小于 − 10 dB。所提出天线的整体性能经过实际验证、讨论和展示。