A multi‐state high gain antenna based on metasurface is proposed. The antenna is composed of two stacking layers and a ground plane. The metasurface is constituted by two layers with the same size. And both of the two layers contain a copper patch array which is formed by 4 × 4 square copper cells uniformly distributed along x and y directions. The metasurface antenna is excited by the aperture coupled structure. The structure is consists of an anomaly microstrip line and a narrow slot etched in the ground plane. Genetic algorithm (GA) is adopted to optimize all the parameters and obtain the best performance of the metasurface antenna. By appropriately choosing the dimensions of the antenna, the proposed antenna can be achieved with the impedance bandwidth (RL≥10 dB) of about 340 MHz (7.8% at 4.36 GHz), 180 MHz (3.6% at 5.02 GHz), and 2800 MHz (41.1% at 6.81 GHz). The peak gain of the proposed antenna is 10.1dBi, 6.9 dBi, and 10.5dBi at 4.26 GHz, 5 GHz, and 7 GHz. In addition, the proposed metasurface antenna can work in multistate, which makes it an excellent candidate for practical applications.

中文翻译：

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基于超表面的多态高增益天线

提出了一种基于超表面的多状态高增益天线。天线由两个堆叠层和一个接地层组成。超表面由具有相同大小的两层组成。这两层都包含一个铜斑块阵列，该铜斑块阵列由沿着x和y方向均匀分布的4×4方形铜单元形成。超表面天线被孔径耦合结构激发。该结构由异常微带线和在接地面上蚀刻的窄缝组成。采用遗传算法（GA）优化所有参数，并获得超表面天线的最佳性能。通过适当地选择天线的尺寸，所提出的天线可以与大约340兆赫（在4.36千兆赫7.8％），180兆赫（在5.02千兆赫3.6％）的阻抗带宽（RL≥10分贝）来实现，和2800兆赫（41。在6.81 GHz时为1％）。拟议天线的峰值增益在4.26 GHz，5 GHz和7 GHz时分别为10.1dBi，6.9 dBi和10.5dBi。另外，所提出的超表面天线可以在多态下工作，这使其成为实际应用的极佳候选者。