S-Parameter ngspice plot about qucs_s HOT 3 CLOSED

This may be the issue...

Qucs-S has issues plotting single frequencies, CW. In #156 Vadim used a 3D plot for a temporary fix.

Qucs/ngspice use different methods to calculate simulation frequencies from Start, Stop, Step and Number. One has to play around with the Qucs simulation settings to get the exact frequencies in ngspice. Vadim can explain better than I.

S-parameters_ngspice_prj.zip

from qucs_s.

I found an old QucsStudio schematic from an ST presentation that looks like your schematic. Forgot where I found it.

Verilog Compiled_Library_prj.zip

from qucs_s.

@dwarning It is a known issue and explained in #156 and #161 The plotting engine cannot assemble a set of 1x1 plots in a smooth curve. Two solutions are possible:

• Set line style to Circles/Stars in the diagram properties. You will see the simulation points. Also you may use the table.
• Use the scripting simulation to assemble a vector from set of 1x1 plots. I have uploaded a CV-curve simulation example that uses this approach. See #156 for more info.

from qucs_s.