上海科技大学知识管理系统

As a key technology in the fields of future mobile communications and antenna systems, research on electromagnetic wave polarization based on metasurfaces has garnered widespread attention. However, in the current realm of polarization conversion metasurfaces, existing works still face challenges such as low operating frequencies, limited bandwidth, low conversion efficiency, and limited functionality. This paper presents the design of two types of reflective metasurface structures: a broadband electromagnetic wave polarization conversion metasurface and a beam steering metasurface. Specifically, by integrating anisotropic principles, we design a polarization conversion metasurface unit composed of a central "C"-shaped metallic aperture and diagonal "L"-shaped metallic strips, capable of achieving broadband linear polarization conversion from 22.5 GHz to 48.5 GHz. Building upon this structure, the beam steering metasurface incorporates phase modulation principles; by altering the opening angle and rotation angle of the aperture rings, specific phase gradients between units can be realized, thereby enabling beam steering functionality at 30 GHz based on the generalized Snell's law. Simulation results closely align with theoretical expectations, thoroughly validating the functionalities of the designed metasurfaces in polarization conversion and beam steering. This approach effectively addresses the limitations of existing works and demonstrates promising application prospects in future communication systems and antenna technologies.