On Sat, Dec 21, 2019 at 09:40 AM, Gary O'Neil wrote:
They also provided the ¡°proof¡± for this in an earlier post #8013.
Hi Gary,
Well, that proof in #8013 is certainly terse!
I have a question:
From the proof, I notice that sometimes G is set equal to +1 or to -1 (for open or short) and then this equality is used to simplify the equations. But I'm wondering -- when is G ever equal to +1 or -1? Real Shorts and Opens have non-ideal Gammas, and, when these imperfections are used to define the standards (as, for example, part of a cal kit's definitions) and the VNA subsequently calibrated using these standards, the VNA's measured S11 values for these standards should map to these imperfections and not map to -1 and +1.
In other words, why set G to +1 or -1?
Thanks for any insight you can provide.
- Jeff, k6jca
