Analysis Of Electromagnetic Scattering Characteristics Of Anisotropic Thin Dielectric Sheet By Integral Equation Method

The thin dielectric sheet and the periodic thin dielectric sheet structures play an important role in the military and engineering.It is of great significance and practical value to analyze the electromagnetic scattering characteristics of such thin dielectric sheet and periodic thin dielectric structure.Thin dielectric layers such as graphene have a lot of unique properties which is different from what the three-dimensional materials have shown.And the periodic thin dielectric structures,such as FSS,have drawn the researchers' attention many years ago due to their excellent electromagnetic properties.Therefore,it has become an important part of computational electromagnetics to develop a method that can analyze the electromagnetic scattering characteristics of thin dielectric sheet and the periodic thin dielectric sheet structure quickly and accurately.In this paper,by introducing Periodic Green's function,a method that can be used to analyze the electromagnetic scattering properties of the thin dielectric sheet and the periodic thin dielectric layer structures has been proposed,based on the full-wave equivalent model of thin dielectric.First,in this thesis,a method for thin dielectric sheet is proposed in this thesis basede on full-wave equivalent model and the method can be extend to multilayer thin dielectric sheet.Then,we introduce the difference of conductivity between the graphene biased by a magnetostatic field and non-magnetic bias.By this,we propose a thin dielectric sheet integral equation method for anisotropic medium,which can be used to analyze anisotropic thin dielectric materials such as graphene biased by a magnetostatic field.Second,for periodic thin dielectric sheet structure,we introduce Periodic Green's function,and the convergence of Periodic Green's function in several different forms of expression is also compared.Then extend Periodic Green's function to the thin dielectric sheet integral equation method in Chapter 3,so that we can analyze the electromagnetic scattering properties of the periodic thin dielectric sheet structures.Finally,we introduce the problem of the current continuity that the periodic Green's function will encounter when calculating the actual problem.Then the formula of transmission coefficient and reflection coefficient in this case is deduced.At last,The results of these numerical examples verify the efficiency and accuracy of the proposed methods in the papar.