Strange phase angle results using phase versus wphase

[tomhajjar]

I’m having trouble understanding why when I plot using “wphase” versus “phase” for S parameter analysis of varactor based phase shifter, it results in dramatically different plots. I want to show phase change without the phase wrap but  wphase is retuning phase values 100x what phase produces.

phase=phase(S[2, 1])

unwrappedphase=wphase(S[2, 1])

I get the same results in Qucs. Does the “Qucs/QucsStudio” unwrap function fail for this case or am I misunderstanding the data?

[tomhajjar]

I’m having trouble uploading the files. I will email them.

[tomhajjar]

The strange display was due to letting the plots auto-range.

[QucsStudio]

This is indeed a bug. Thanks a lot for reporting it!

As a workaround: Write the term wphase(…) directly into the diagram. This works correctly.

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