waveguide modes tool dieletric material

[Micol]

Hello,

I am trying to change the dielectric property of my waveguide source using the waveguide tool. Although, whenever I change it from 1 to the value I need and select apply, it switch back to a relative permittivity of 1.
Can you help me to solve this issue?

Thank you

[ofli]

Hi Micol,

Did you model the waveguide filling (where you placed the waveguide source) and set the material parameters of this object correctly in the simulation settings?