A phase vs frequency plot helps identify where the middle of the transition is. Sometimes that's easier than trying to find the -3dB points. A classic S curve from +90 to -90 degrees phase, and 0 is the center frequency, and +/- 45 degrees are easy to find.
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-----Original Message-----
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Sent: May 12, 2025 10:15 AM
To: <
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Subject: Re: [nanovna-users] Smith Charts
Thanks for the illustration. How did you get Q = 145.8? Why does the rectangular plot needs phase slope added to discern? Is the dip it too broad and shallow? A rectangular phase plot is available. How would you use it?
Alan, if I handed you a device and asked you to find the series-resonant frequency and the bandwidth at that point with a NanoVNA, what would you do? If the VNA was equipped with the feature you're proposing, what would you do differently?
Brian
