Hi Gabriel -
From those graphs it's obvious your calibration is way off because S11 exceeds
0dB (meaning outside of the smith chart) by quite a bit. If you plot the smith
chart you I'm guessing it will be all over the place, rather than making
circles around the center like it should. Please show the smith chart instead
next time because it's hard to see what's really going on with those graphs
(impedance is always a 2 dimensional quantity).
I guess you meant message 6456, and agree that was a poor choice of graphs.
I do not calibrate for such a wide range. So, second attempt:
Looking at logmag for CH0 and CH1 terminated by 50 Ohms
(AKA Isolation), then you will notice that return loss gets poorer > 100MHz.
Oristo
