Here, a near-zero permittivity (ε) and permeability ( μ ) metamaterial superstrate is presented as a decoupling structure for a multiple-input–multiple-output (MIMO) antenna. The proposed design offers peak isolation of 41 dB with reduced edge separation of 0.042 λ _o at the resonating frequency. To verify the simulation results, the prototype of the proposed superstrate and antenna is fabricated and tested. The two-element MIMO antenna has −10 dB impedance band of 5.5–5.92 GHz with a peak measured gain of 7.41 dBi and efficiency above 78%. The measurement results ensure an isolation enhancement of 30 dB with a correlation coefficient of <0.26 within the operating band. The proposed method offers a good design technique for high gain and a closely packed MIMO antenna system for WLAN applications.

中文翻译：

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使用接近零的ε和 μ 用于MIMO应用的基于超材料的盖板

在这里，介电常数（ε）和磁导率（ μ ）超材料覆层是作为多输入多输出（MIMO）天线的去耦结构而提出的。拟议的设计提供了41 dB的峰值隔离度，减少了0.042的边沿间隔 λ _o以共振频率。为了验证仿真结果，制造并测试了所提出的盖板和天线的原型。两元素MIMO天线的-10 dB阻抗带为5.5–5.92 GHz，峰值测量增益为7.41 dBi，效率高于78％。测量结果确保在工作频段内隔离增强30 dB，相关系数<0.26。所提出的方法为高增益提供了良好的设计技术，并为WLAN应用提供了紧凑的MIMO天线系统。