In this paper, a cascade asymmetrical metasurface (CAM) is proposed to generate the functionality of multiband spatial angular filtering transmissions. More specifically, dual-asymmetrical-C-slits printed on the CAM can readily tune the transmission frequencies by controlling the incident angles of electromagnetic waves. In the meanwhile, the CAM with multiple hierarchical structures would be capable of realizing the multiband operative mode with the performance of spatial angular filtering. The proposed method, by using multilayer CAM structures to realize multiband spatial angular filtering transmissions, can offer an efficient way to fulfill reconfigurable radiations of the antennas by tuning the emission frequencies.

中文翻译：

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通过级联非对称超表面的多波段空间角度滤波传输

在本文中，提出了级联非对称超表面（CAM）来生成多波段空间角度滤波传输的功能。更具体地说，打印在 CAM 上的双不对称 C 形狭缝可以通过控制电磁波的入射角轻松调整传输频率。同时，具有多个层次结构的CAM将能够实现具有空间角度滤波性能的多频段工作模式。所提出的方法通过使用多层 CAM 结构来实现多频带空间角度滤波传输，可以提供一种有效的方法来通过调谐发射频率来实现天线的可重构辐射。