This study proposes an ultra-wideband (UWB) metasurface-based beam-switching antenna system. A coplanar (CP) waveguide fed slot antenna (with 49% operating bandwidth) is coupled with a hexagonal metallic aperture to generate CP beam in the 10.2–10.8 GHz band. An octagonal split ring inclusion-based meta-element is designed to achieve 2π transmission phase variation with near-unity magnitude. The principle of the Pancharatnam–Berry metasurface is used to design an offset metasurface superstrate for tilting the main beam of the UWB antenna for the CP band. Measured results ( S ₁₁ , axial ratio, and radiation pattern) agree well with full-wave simulations. The fabricated X-band UWB aperture coupled antenna system uses the metasurface superstrate to achieve a broadside beam for the lower band and tilted beam for the upper band. This antenna system holds promise for next-generation vehicular and satellite communication applications.

中文翻译：

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X波段低损耗超宽带波束切换超表面天线

这项研究提出了一个超宽带（UWB）基于表面的波束切换天线系统。共面（CP）波导馈电缝隙天线（工作带宽为49％）与六角形金属孔径耦合，以产生10.2-10.8 GHz频带内的CP波束。设计了一个基于八边形裂环内含物的元元素，以实现具有近统一幅度的2π传输相位变化。Pancharatnam–Berry超表面的原理用于设计偏置超表面上覆层，以倾斜CP波段的UWB天线的主波束。测量结果（ 小号 _{如图11所示} ，轴比和辐射方向图）与全波模拟非常吻合。所制造的X波段UWB孔径耦合天线系统使用超表面覆层来实现较低频段的宽边波束和较高频段的倾斜波束。该天线系统有望用于下一代车辆和卫星通信应用。