On May 31, 9:09*am, K1TTT wrote:
ah, but in this case consider that you have a pint of blue water
moving to the right and a pint of red water moving to the left to be a
better analogy to currents of the waves moving forward and backward in
the coax. *there are then 3 possibilities:

No, no, no. I am NOT talking about forward and reflected waves moving
in opposite directions. I am talking about two coherent, collimated
waves *MOVING IN THE SAME DIRECTION* in an RF transmission line away
from an impedance discontinuity - either two waves moving forward
toward the load or two waves moving backwards in the opposite
direction toward the source. Such multiple wavefronts occur at
impedance discontinuities because of multiple reflections.

Forward and reflected waves (waves moving in opposite directions in a
constant Z0 environment) do NOT interact. At an impedance
discontinuity, the component reflections and transmissive waves do
interact if they are coherent, collimated, and MOVING IN THE SAME
DIRECTION.
--
73, Cecil, w5dxp.com