Gene Fuller wrote:
If you choose not to actually read these references I will tell you that
the first section is a full-blown Maxwell's equations treatment, and the
second section employs an interfering wave treatment.

Everyone already knows the end results so Maxwell's equations offer no
clues as to what actually happens in reality in the process of
yielding those results. The interfering wave treatment is the only one,
to the best of my knowledge, that yields clues as to the physical events
involved. What happens has to obey the laws of physics including the laws
of interference and conservation of energy and momentum.

What I find interesting is that there is not one mention of bouncing
energy waves or waves that have disappeared but their energy lives on.

Gene, neither have I ever said anything about "bouncing waves". That is entirely
a diversionary invention of yours. I have talked about reflected waves, Dr. Best
has talked about reflected waves, and the Melles-Griot web page also talks about
reflected waves. You are on record as asserting that reflected waves don't exist
thus disagreeing with Melles-Griot. Have you ever used a TDR?

If you read your favorite Melles-Griot material carefully without adding
your own spin (how else could it be, etc.) you will see that they do not
discuss bouncing energy waves either.

Neither have I ever discussed "bouncing energy waves". That is your very
own diversion from subject matter that you are apparently loathe to discuss.
The Melles-Griot web page indeed does discuss destructive interference between
two rearward-traveling reflected waves, the "lost" energy of which, winds up
traveling in the forward direction toward the load.

You will notice that M-G say the energy "appears" in the transmitted wave.

Is that anything like angels appearing to the Virgin Mary? :-)
"Appears", in the M-G context means "coherently joins".

How does the "lost" energy from two interfering rearward-traveling waves
appear in the forward-traveling transmitted wave energy without changing
direction? Please don't just ignore that question.

Dr. Best dismissed the rearward-traveling energy and simply magically re-
introduced it into the forward wave. Do you also believe in magic? Dr. Best
also denied that interference had anything to do with matching when, in reality,
interference has everything to do with matching. A Z0-match point in a
feedline with reflections is impossible without interference.

Why didn't you object to Dr. Best's use of "bouncing waves"? Here's a quote
from his article: "When the system reaches the steady state, the two rearward-
traveling waves at the match point are 180 degrees out of phase with respect
to each other and a complete cancellation of both waves occurs."

That is a true statement and Melles-Griot and I have said exactly the same thing.
The question is: What happens to the energy in those cancelled waves? It doesn't
continue on toward the source. It doesn't stand still. It is not destroyed. Can
you guess what happens to it? Melles-Griot says it appears in the forward wave.
Do you think "appears" is a magic word? Can energy suddenly appear from nowhere?

Hecht in _Optics_ tells us that added constructive interference energy always
originates from and is equal in magnitude to the lost destructive interference
energy. Anything else violates the conservation of energy principle. The
answer is obvious. Destructive interference energy left over from the
cancellation of two rearward-traveling reflected waves changes direction
and appears in the forward wave. There is simply no where else for it to go.

I think I have finally figured out the root of the disagreement. Your
approach is similar to a one-trick pony. You have latched onto the
concept of interference to the exclusion of any other valid approach.

Nope, I'm open for any other valid approach but nobody has furnished another
one so far. I'm not interested in net answers. I'm interested in explaining
the physical process within the accepted laws of physics. No magic or steady
state short cuts accepted.
--
73, Cecil http://www.qsl.net/w5dxp



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