Transmission and Reflection Coefficients

Calculate the properties of frequency selective surfaces (FSS) in a multilayer scattering scenario by using transmission and reflection coefficients for plane waves. Use in conjunction with periodic boundary conditions (PBC), multilayer planar Green's functions or infinite planes for a more efficient solution.

Note: Only a single plane wave is supported (no additional sources are allowed) when requesting transmission / reflection coefficients.

The model must either contain:

planar multilayer substrate without any other geometry / mesh in the model

a 2D periodic boundary condition (PBC).

The transmission coefficient is defined as:

(1)

τ = \frac{E_{t}}{E_{i}}

and the reflection coefficient:

(2)

ρ = \frac{E_{r}}{E_{i}}

Figure 1. A plane wave interacting with a planar structure.