If I have a frequency dependent material and I have data for its real and imaginary components of the dielectric. Does ANSYS HFSS allow for defining the material in terms of it real and imaginary components? Because when I tried it seems to only take in data for the relative permittivity and the frequency. So, in that case would it still be valid to run a simulation if I get the magnitude of the relative dielectric from the real and imaginary components and just divide that by the permittivity of free space to get the relative permittivity?