# 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.

The model consists of a circular cylinder. The cylinder height is set to half a wavelength at the excitation frequency.

1. Define the following variables:
• lambda = 1 (The wavelength in free space.)
• freq = c0/lambda (The frequency for free space wavelength.)
• h = lambda/2 (The height of the cylinder.)
• r = 0.1 (The radius of the infinite cylinder.)
2. Create a cylinder.
• Definition method: Base centre, radius, height
• Base centre: (0, 0, -h/2)