In this paper, a double-layer structure of ultra-bandwidth cross-polarization converter (PC) has been devised in line with the rationale of the metasurface. The project can bring about a superior 90° conversion effect of the incident wave when it is perpendicularly incident. This PC is an improvement and majorization of the single-layer PC with a bowknot surface structure, which can hit the mark of improving the polarization conversion ratio in the low frequencies and enlarging the bandwidth. In this article, not only is the basic principle of polarization conversion examined but also the parameters are discussed. In addition, points of view such as incidence angle and current are utilized for analysis. Ultimately, the cross-polarization conversion can be achieved in the range of 0.63–1.50 THz, whose relative bandwidth is 81.7% and bandwidth is 0.87 THz. The proposed design may be worth applying in radar, communication, and imaging technologies.

中文翻译：

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通过双层超颖表面实现超带宽交叉极化转换

在本文中，根据超颖表面的原理，设计了一种双层结构的超宽带交叉极化转换器（PC）。当垂直入射时，该项目可以使入射波产生出色的90°转换效果。该PC是具有蝴蝶结表面结构的单层PC的改进和主要化，可以达到改善低频极化转换率和增大带宽的标记。本文不仅讨论了偏振转换的基本原理，还讨论了参数。另外，利用诸如入射角和电流之类的观点进行分析。最终，交叉极化转换可以在0.63-1.50 THz的范围内实现，其相对带宽为81.7％，带宽为0。87太赫兹 提议的设计可能值得在雷达，通信和成像技术中应用。