So how does a 1/2WL piece of transmission line driving a
50 ohm load wind up with the voltage and current in phase
no matter what the SWR?
--

If the characteristic impedance of the transmission line is 50 ohms, then
there are no reflections; furthermore the current and voltage are in phase
at every point along the line, There are no standing waves in this case.

In fact it doesnt matter how long the line is as long as it is terminated in
its charcteristic impedance. This case corresponds to the circle in the
middle of the Smith Chart on which the impedance is constant.


"Cecil Moore" wrote in message
. com...
Bob Agnew wrote:
Just a nit: You said:

If there are reflections, the voltage
and current are in phase only every 1/4 wavelength.

Actually, if there are reflections, the voltage and current ar NEVER in
phase.
c 73, Cecil http://www.qsl.net/w5dxp