On Fri, Jan 24, 2020 at 09:26 AM, Norbert Kohns wrote:
I am wondering, that at full reflection the response moves over the perimeter
of the smith chart.
Hello Norbert,
I think it has to do with calibration.
After calibration direct at the nanoVNA CH0 SMA female plug, a 1 m coax cable connected to the reference plane with open at its other end, should give *perfect circles spiraling inwards* in the smith chart, see below.
In the program nanoVNA-saver *no extra calibration* was used.
Compared with the measured 101 points of the nanoVNA, the curve in the nanoVNA-saver program looks much smoother with 505 points. See the picture on the right and below.
For more details have a look to my web page:
73, Rudi DL5FA
