Creating the Model

Create the model in CADFEKO. Define any ports and sources required for the model. Specify the operating frequency or frequency range for the model.

1. Define the following variables:
• freq = 100e6 (The operating frequency.)
• d = 0.004 (Plate thickness.)
• a = 2 (Width of plate.)
• b = 1 (Depth of plate.)
• epsr = 7 (Relative permittivity.)
• tand = 0.03 (Loss tangent.)
• thetai = 20 (Zenith angle of incidence.)
• phii = 50 (Azimuth angle of incidence.)
• etai = 60 (Polarisation angle of incident wave.)
2. Create the media for the thin dielectric.
1. Create a dielectric with the relative permittivity set to epsr, dielectric loss tangent to tand. Rename its label to substrate.
2. Create a single-layered dielectric.
• Label: thin_dielsheet
• Thickness: d
• Dielectric material: substrate
3. Create a rectangular plate centred at the origin in the XY plane.
1. Create a rectangle.
• Definition method: Base centre, width, depth
• Base centre: (0, 0, 0)
• Width: a
• Depth: b
4. Set the face medium of the rectangular plate to thin_dielsheet.
5. Add a single incident plane wave source from direction θ=thetai and ϕ = phii. Set the polarisation angle to etai.
6. Set the frequency to freq.