Using FEM in feko

degleve_jarmlami

Hello,

I am trying to use the FEM of feko to solve part of my problem and have some troubles with meshing and material representation.

I try to simulate some copper plate :

• top face : 20mm x 4mm
• thickness : 500nm
• frequency : 1GHz < - > wavelength : 300mm
• excitation : plane wave incident to the face
• Since the skin depth of copper at this frequency is 1um, I cannot use the classic MoM method since FEKO would not represent the wave passing through the plate (FEKO asks for thickness of material greater than the skin depth, and in the case you put in less it does not make the wave passing through)

In this case, I represent my copper with a dielectric of high conductivity since FEKO cannot apply FEM to metal. However, it asks for an absurd number of mesh (Tb of mesh data). I would expect that a mesh of size 0.5mm would be way enough here, but if I set it manually feko complains that the "tetrahedron face is too big : face / lamba^2 = …"

Would you know how to proceed to use FEM in this case, to model the wave passing through the plate, and with a reasonable number of mesh ?

Thanks,

Pierre

Jaehoon

Hello @degleve_jarmlami,

Before going further with FEM simulation, I'd like to share our Feko EMC training material, where the shielding effectiveness of a conductive spherical enclosure is calculated.

Please refer to the example 1 and have some idea.

Best regards,

Jaehoon

EMC_Day2_Shielding.pdf