In this paper, a practical scheme is studied to reduce mutual coupling interference (MCI) between two extremely adjacent MIMO (multiple input multiple output) antenna elements, where the two-dimensional metamaterial units with 1 × 7 meta-FCRR1 (fold complementary ring resonator) and 5 × 7 double-layer meta-FCRR2 are etched to suppress the surface wave. The proposed metamaterial can well match the left hand electromagnetic in electromagnetic field, and the meta-FCRR1 + 2 as a miniature notch filter is equivalent to a negative permeability medium. Then, the microstrip antenna array using the co-planar waveguide mode is fabricated and the measured results are compared with the simulation. The results indicate that the MCI of antenna array with meta-FCRR1 + 2 are effectively reduced to 26 dB and 24 dB at resonance frequency of interest (2.45 GHz and 4.6 GHz). And the approximately 16.67% and 13.3% matching impedance bandwidth are obtained at the return loss S11 < − 10 dB. And the total efficiency, the envelope correlation coefficient (ECC), diversity gain (DG), voltage standing wave ratio (VSWR) are presented to verify the better performance of MIMO antenna array by suppress the MCI.

在本文中，研究了一种实用的方案来减少两个极其相邻的 MIMO（多输入多输出）天线元件之间的互耦合干扰（MCI），其中二维超材料单元具有 1 × 7 meta-FCRR1（折叠互补环形谐振器） ) 和 5 × 7 双层 meta-FCRR2 被蚀刻以抑制表面波。所提出的超材料可以很好地匹配电磁场中的左手电磁，meta-FCRR1+2作为微型陷波滤波器等效于负磁导率介质。然后，制作了采用共面波导模式的微带天线阵列，并将测量结果与仿真结果进行了比较。结果表明，具有元 FCRR1 + 2 的天线阵列的 MCI 在感兴趣的谐振频率（2.45 GHz 和 4. 6 GHz）。并且在回波损耗 S11 < - 10 dB 时获得了大约 16.67% 和 13.3% 的匹配阻抗带宽。并给出了总效率、包络相关系数（ECC）、分集增益（DG）、电压驻波比（VSWR），以验证MIMO天线阵列通过抑制MCI具有更好的性能。