Analytical Approach of EM Wave Propagation in Different Stacked Materials Encapsulated by Rectangular Waveguide

In general, materials can be categorized into three types, namely dielectric, magnetic, and conductive materials. The electromagnetics (EM) wave propagation inside the material depends on the type of material, which is represented by three important parameters, i.e., permeability ($\mu$), permittivity ($\epsilon$), and conductivity ($\sigma$). In this paper, these three parameters are applied for the calculation of reflection and transmission coefficients, when the EM wave propagates through more than two different stacked materials encapsulated by a rectangular waveguide in the frequency range of 2 GHz to 10 GHz. The effect of material thickness on the reflection and transmission coefficients is also investigated for a specific value of three parameters. Furthermore, these coefficients can be used to analyze the phenomena occurred in two different stacked materials encapsulated by a rectangular waveguide.