In this article, a dual-port ring-shaped ceramic antenna is proposed and examined. The antenna ports are orthogonally placed for achieving the high isolation (more than 20 dB). Ceramic material is fed through circular aperture, which excites the HEM_11δ+2 mode inside it. Metasurface module is suspended over the proposed antenna for converting the LP-to-CP waves. Fabricated antenna confirms its operation from 5.43 to 5.82 GHz with a fractional bandwidth of 6.93%. After applying the metasurface, 3-dB axial ratio is achieved from 5.45 to 5.65 GHz. Stable radiation properties and good value of diversity parameter makes it suitable for WLAN (5.5 GHz) application.

中文翻译：

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用于 WLAN 应用的线性极化到圆极化转换器加载的正交放置的双端口环形陶瓷基 MIMO 天线

在本文中，提出并检验了一种双端口环形陶瓷天线。天线端口正交放置以实现高隔离度（大于 20 dB）。陶瓷材料通过圆孔进料，激发其中的 HEM _{11 δ +2}模式。超表面模块悬挂在拟议的天线上方，用于将 LP 波转换为 CP 波。制造的天线确认其在 5.43 至 5.82 GHz 的范围内工作，部分带宽为 6.93%。应用超表面后，从 5.45 到 5.65 GHz 实现了 3 dB 的轴比。稳定的辐射特性和良好的分集参数值使其适用于 WLAN (5.5 GHz) 应用。