Research On Graphene Phase Gradient Metasurface Spectral Radiation Characteristcs Based On Convolution Theorem

The phase gradient metasurface based on graphene materials has great potential and unparalleled development prospects among various metasurfaces.Due to the excellent electromagnetic and mechanical properties of graphene materials,this metasurface can help achieve high efficiency of metasurface design starting from two angles:change its geometry structure and change the physical properties of itself.This paper starts from these two aspects to study the graphene metasurface materials.By combining the control methods of coding metasurfaces that has developed rapidly in recent years,the same or the same metasurfaces can achieve multiple functions.Based on the control theory of the coding metasurface,a very concise form that can be applied to the phase gradient metasurface is simplified,which improves the practicality of the control method.The electromagnetic properties of graphene materials are considered,and the distribution of surface conductivity is mainly studied,as well as the mathematical model of graphene materials is established by surface conductivity method.Designed an ideal metacell based on graphene materials,and CST Microwave Studio is used to model and simulate the metacell,selected the appropriate metacell to construct the metasurface,and verified it by simulation The feasibility of the ideal metasurface is introduced,and the metasurface control method based on the convolution theorem is substituted to study the working characteristics of the control method.In addition,it is proved that if such a metasurface can be actually realized,then a dynamically adjustable metasurface will also be realized.A two-dimensional graphene structure was designed,and the characteristics of this structure were verified using COMSOL Multiphysics.The appropriate metacell was selected as a guarantee to construct and simulate a phase gradient hypersurface,which verified the feasibility of this metasurface It is reasonable to speculate that this metasurface has a lot of room for optimization.At the same time,the meta surface control method based on the convolution theorem is applied to this meta surface,which verifies the universality of this control method.Fully considering various factors that may cause deviation,the accuracy and work of this control method effectiveness is proved.