A broadband high gain polarization reconfigurable antenna based on metasurface has been presented. The antenna is composed of a planar metasurface, a slot antenna and an air cavity. The metasurface is made up of 64 identical patches, and all the patches are on the top surface of the substrate. The spatial equivalent circuit of the metasurface is discussed and two approximate calculation formulas of the equivalent circuit are obtained. The antenna can be reconfigured to linear polarization, left-hand and right-hand circular polarizations by adjusting the relative positions between the metasurface and the planar slot antenna. The gain of the antenna is improved. In order to verify these methods, the antenna is studied and designed to operate at around 11GHz. The simulated and measured results show that the 3dB axis ratio bandwidth is 10–12 GHz (fractional bandwidth 18.18%) and maximum gain of 14.6 dBi.

提出了一种基于超表面的宽带高增益极化可重构天线。天线由平面超表面，缝隙天线和气腔组成。超表面由64个相同的贴片组成，所有贴片都位于基板的顶表面上。讨论了超表面的空间等效电路，并得出了等效电路的两个近似计算公式。通过调整超表面与平面缝隙天线之间的相对位置，可以将天线重新配置为线性极化，左旋和右旋圆极化。天线的增益得到改善。为了验证这些方法，对天线进行了研究并设计为可在11GHz附近工作。