Hi Colin,
Please, note that s2p file is in the "RI" format, your formula to compute SWR is not correct.?? "RI" means that one column (2nd column) shows the real part of S11, while the other column (3rd column) the imaginary part of S11.
Your formula is correct when the s2p file is in the "MA" format, which means that one column is the Magnitude of the S11, while the other column is the Angle of the S11. Let me recast your formula saying that SWR = (1+M) / (1-M)?? where M is the magnitude of S11, taken from the proper column of a s2p file in MA format.
At the moment I cannot run nanoVNA-saver, so I don't know if the exported s2p file are in MA or RI format.
regards
Piero, I0KPT
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Il 14/09/2020 22:51, Colin McDonald ha scritto:
With some more research I managed to create a formula to show swr in a SNP spread sheet.
SWR = (MA+1)/(1-MA)
Where MA (or RI) is the second colomn in the spread sheet.
for instance SWR = (B3+1)/(1-B3)
