A metasurface (MS) antenna for the 5 GHz wireless local area network (WLAN) band is presented in this paper. The antenna is feed by a modified aperture-coupled structure with an optimized rectangular nonuniform MS to widen the bandwidth and improve the gain. The proposed antenna has a thickness of 4 mm and occupies an area of 50 mm × 50 mm. The operating frequency range of the antenna is 4.72–6.19 GHz, covering the 5.15–5.825 GHz band used by the 5 GHz WLAN. The measured average gain is 7.23 dBi. The simulated specific absorption rate values under 1 g and 10 g standard are lower than the limitation of U.S. and European. Due to its simple structure, wide bandwidth and small size, the proposed MS antenna has great potential in the wearable applications.

中文翻译：

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基于非均匀超表面的宽带宽高增益可穿戴天线设计

本文介绍了一种用于 5 GHz 无线局域网 (WLAN) 频段的超表面 (MS) 天线。天线由改进的孔径耦合结构馈电，该结构具有优化的矩形非均匀 MS，以加宽带宽并提高增益。建议的天线厚度为 4 mm，占用面积为 50 mm × 50 mm。天线的工作频率范围为 4.72-6.19 GHz，覆盖了 5 GHz WLAN 使用的 5.15-5.825 GHz 频段。测得的平均增益为 7.23 dBi。1g和10g标准下的模拟比吸收率值低于美国和欧洲的限制。由于其结构简单、带宽宽、尺寸小，所提出的 MS 天线在可穿戴应用中具有巨大的潜力。