Dear community,

I’m trying to use the HF-solver to simulate the S-Parameters for a long single Thick-Film-Resistor of 175 MegOhm (Diameter = 8mm, Length = 350mm) in a coaxial shielding. I used Discrete Face ports as well as Waveguideports as instructed by Christian Kremers (DS Support). Please find my simulation model attached.

Unfortunately the calculated S-Parameters are quiet unrealistic below 10 kHz. Also properties like Z and Gamma are unphysically. All properties I monitored (characteristic impedance, propagation constant, S-Parameters and T-Parameters) change when varying the reference impedance, the frequency of mesh adaption as well as the number of meshcells - I am confused. You may take a look at the comparison between analytics and CST-results (picture attached).

May somebody of you already worked with HF-solver in lower frequency regime? I would be deeply grateful for helpful hints.

Thanks in advance

Tobin

CST Studio Suite ​​​​​​​