# 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:
• lambda = 20 (The wavelength in free space.)
• freq = c0/lambda (The operating frequency.)
• epsilon = 36 (Relative permittivity.)
2. Create a new dielectric labeled diel with relative permittivity set to epsilon.
3. Create a sphere.
• Definition method: Centre, radius
• Centre: (0, 0, 0)