Create the model in CADFEKO.
Define any ports and sources required for the model. Specify the operating frequency or
frequency range for the model.
-
Define the following variables:
- lambda = 20 (The wavelength in free space.)
- freq =
c0/lambda (The operating frequency.)
- radius = 1 (Sphere radius.)
- epsilon = 36 (Relative permittivity.)
-
Create a new dielectric labeled diel with relative
permittivity set to epsilon.
-
Create a sphere.
- Definition method: Centre,
radius
- Centre: (0, 0, 0)
- Radius: Radius
-
Set the region of the sphere to diel.
-
Add a single incident plane wave with θ=180° and ϕ=0°.
-
Set the frequency to freq (≈15 MHz)
The geometry is symmetric about the 3 principal planes, but the source is
not symmetrical. The electric fields of the incident plane wave are purely X directed for the chosen incident angle.
-
Specify the symmetry about 3 principal planes:
-
X=0: Electric
symmetry
-
Y=0: Magnetic
symmetry
-
Z=0: Geometric
symmetry
Tip: Exploit model symmetries (if it exists) in a
large or complex model to reduce computational costs.