This article introduces a simple decoupling structure to suppress the mutual coupling between two microstrip patch antennas. The introduced decoupling structure is implemented by a coupled meander‐line resonator structure and it is on the same plane of the radiating patches so that the mutual coupling can be suppressed without increasing the profile. The two antennas are closely packed and the center distance between two patch antennas is only 0.22 wavelength at 2.6 GHz. The results indicate that the port isolation can be enhanced to more than 30 dB when the proposed decoupling structure is inserted between the antennas, which is a great enhancement compared to the initial coupled antennas. Moreover, the distortion of the radiation pattern caused by the mutual coupling can also be improved by the introduced decoupling structure. Further, the proposed decoupling structure can also be appliable for a multielement antenna array, and can also effectively enhance the isolation between various elements.

中文翻译：

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耦合曲折线谐振器，用于抑制微带贴片天线的相互耦合

本文介绍了一种简单的去耦结构，以抑制两个微带贴片天线之间的相互耦合。引入的去耦结构是通过耦合的曲折线谐振器结构实现的，并且它位于辐射斑片的同一平面上，因此可以在不增加轮廓的情况下抑制相互耦合。两个天线紧密包装，两个贴片天线之间的中心距离在2.6 GHz时仅为0.22波长。结果表明，当将建议的去耦结构插入天线之间时，端口隔离可以提高到30 dB以上，与初始耦合天线相比，这是一个很大的增强。此外，通过引入的去耦结构也可以改善由相互耦合引起的辐射图的畸变。进一步，