Richard Clark wrote:
What does your software report for a software 40 Ohm line feeding a
software 50 Ohm load? That is, when all data points (that is each
increment of 1 foot) exhibits 0 Watts returned for 5W applied?

My software takes a list of reflected powers, assumes the forward
power is five watts, calculates the 50 ohm SWR for each point, and
plots them every 0.03WL on a Smith Chart. It was written to accept
your data points. If the reflected power above was always zero watts,
all those points would be the same point, i.e. a circle of zero radius
at the center of the Smith Chart.

Take time to plot those 50 ohm SWR points on a Smith Chart with the
0.45 watts reflected point assumed to be the lowest purely resistive
point. A picture is worth a thousand words. I have seen that picture
before. It was when I designed my SWR meter for a Z0 of 450 ohms and
my window-line turned out to have a Z0 of 388 ohms.
--
73, Cecil http://www.qsl.net/w5dxp



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