For the requirements of low mutual-coupling MIMO antennas for WLAN, a new complementary split-ring resonator (CSRR) unit cell is introduced in this paper. A microstrip-fed Vivaldi antenna array is designed for WLAN applications, where compact triple-band gap-complementary split-ring resonator unit cells are loaded between two antennas to examine the effect of unit cells on the rate of mutual-coupling reduction. By inserting the CSRR, the final design offered an improvement in decoupling by 8.5, 10.5, and 18 dB at 3.65, 4.9, and 5.8 GHz, respectively, compared with the reference antenna. By suppressing surface waves, antenna gain and front-to-back ratio are improved.

中文翻译：

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使用 CSRR 的 WLAN 三频 MIMO 天线的互耦合减少

针对WLAN对低互耦MIMO天线的要求，本文介绍了一种新型的互补裂环谐振器（CSRR）单元。微带馈电 Vivaldi 天线阵列专为 WLAN 应用而设计，其中紧凑的三带隙互补开口环谐振器单元被加载在两个天线之间，以检查单元对互耦合减少率的影响。通过插入 CSRR，与参考天线相比，最终设计在 3.65、4.9 和 5.8 GHz 处的去耦性能分别提高了 8.5、10.5 和 18 dB。通过抑制表面波，提高了天线增益和前后比。