Jim Kelley wrote:


W5DXP wrote:
The
33.33W that makes a round trip to the impedance discontinuity and back
to the load is not the same 33.33W that is reflected by the load. TV
ghosting proves that to be true.

TV ghosting is primarily the result of multipathing, which is external
to the antenna system.

:-) I'm talking about TV ghosting due to reflections on the transmission
line between a TV test generator and a TV receiver. The only "multipathing"
involved is the different paths taken by the reflected waves inside the
transmission line.

The only voltage phase reversal in the given example is in the re-reflected
wave associated with the 8.33W.

How are you determining your phase reversals? Don't forget that phase
reversal on reflection occurs when a wave encounters a more dense medium
(or a higher impedance).

Nope, a voltage phase reversal occurs when a wave encounters a *lower*
impedance. A voltage wave encountering a higher impedance does not
reverse phase. In the earlier example, the only lower impedance encountered
is by the rearward-traveling wave flowing back into the impedance discontinuity.
I repeat, Vref2(-rho) is the only voltage phase reversal.
--
73, Cecil, W5DXP