In this paper, a novel, compact, high-gain, directive, and superstrate configuration-based metasurface (MS) antenna has been designed, which incorporates a fractal-shaped slotted patch having a periodic arrangement of square patches along with a shorting via at its center and a couple of rectangular slots in the ground plane. The MS is designed over the FR4 dielectric by introducing a periodic arrangement of unit cells in which the unit cell is structured by a C-type patterned patch in the center surrounded by a couple of L-type-shaped patches. The MS is separated by a layer of Teflon from the conventional patch antenna designed over the FR4 dielectric, thereby acting as a superstrate. The proposed antenna provides good impedance matching across the frequency region of 10.14–10.94 GHz with a unidirectional radiation pattern. A fractional bandwidth of 7.6% and a maximum return loss of 24 dB have been realized at 10.44 GHz. The measured realized gain of 7.57 dBi was obtained at the same operating frequency. As the proposed antenna is more efficient, it can be promoted for $X$ -band operations, such as satellite communication, defense purpose, and medical supervision.

中文翻译：

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使用超表面作为覆盖层配置的增益增强开槽贴片天线

在本文中，设计了一种新颖、紧凑、高增益、定向和基于超覆层配置的超表面 (MS) 天线，它包含一个分形开槽贴片，该贴片具有周期性排列的方形贴片以及一个短路通孔它的中心和地平面上的几个矩形槽。MS 设计在 FR4 电介质上，通过引入单位单元的周期性排列，其中单位单元由中心的 C 型图案贴片构成，周围有一对 L 型贴片。MS 由一层特氟龙与设计在 FR4 电介质上的传统贴片天线隔开，从而充当覆盖层。建议的天线在 10.14-10.94 GHz 的频率范围内提供良好的阻抗匹配，具有单向辐射模式。在 10.44 GHz 下实现了 7.6% 的部分带宽和 24 dB 的最大回波损耗。在相同的工作频率下获得了 7.57 dBi 的实测实现增益。由于提议的天线效率更高，因此可以推广用于 $X$ 波段操作，例如卫星通信、国防目的和医疗监督。