I have a model in HFSS, I want to simulate in under two condition, the first condition is without any magnetic media, assign excitation and calculate fields. The second condition is putting a magnetic media (not exactly ferrite, but with permittivity=1, permeability = from 1 to 10, magnetic saturation = more than zero from 1 to1000, G=2, delta-H=0) the frequency is 100MHz, three terminals, one as input, and two as outputs. incident voltage = 0.5,(driven-Terminal)
under the first condition the simulation is working. But, in the second circumstance, when I define the new material with the properties that I mentioned, I got the error that I must define the magnetic bias for ferrite material (Ms>0), this magnetic bias needs the internal bias, in order to align the dipole of the ferrite, but it did not converge. My question is that why I should define the internal bias? My goal is to magnetize the media by the magentic field that is producing in the model, not by the assigned magnetic bias.