Difference in TDR between Ansys HFSS and SCIKIT-RF

[MrLapDong]

Dear,
I use plot_z_time_step in skrf to generate Time Domain Response, but there's a gap when comparing to the result I generate by HFSS (use the same reference impedance). Do you know the reason why?

Regards,
Dong

[mhuser]

Hello,

The difference come from the extrapolated DC point (if you have extrapolated).

Skrf extrapolation to dc is quite crude but you can also specify manually a known value.

The basic usage is shown in this demo.

Best regards,

Matthias