dansawyeror wrote:
What is the best way to base impedance measurements, by voltage and
current phase or by forward and reflected power?
It would seem that both suffer from the real effects of the taking the
measurement. Measuring voltage suffers from the effects of the reflected
signal, I would assume current does as well. Couplers have a built in
cross talk parameter.

If in a transmission line where the Z0 is known, either method
will give valid results within a certain accuracy. A bridge
circuit would probably yield the most accurate measurement.
--
73, Cecil http://www.qsl.net/w5dxp