Cecil Moore wrote:

Gene Fuller wrote:

Do you see the common factor in your response about "wave
interaction"? In all of your examples there is an interface or some
sort of discontinuity. Nobody argues that waves are forever
unchanging. However, those changes take place only through interaction
with interfaces or other discontinuities.


I don't disagree and I have gone on record as saying that
reflections only occur at physical impedance discontinuities.

You have also gone on record as saying is this:

4/19/07 6:12 AM
"The only thing s11(a1) and s12(a2) encounter are each other and that
interaction completely changes those two waves. The two waves cancel
and their energy components are re-distributed in the opposite
direction. s11(a1) and s12(a2) never encounter an impedance
discontinuity."

73, ac6xg