wrote:

Richard Harrison wrote:
They are contradictory. That`s a fatal flaw.

This may be, but there seems to be some reluctance to point out WHICH
step is contradictory.

The reluctance seems to be your unwillingness to read the replies
which point out exactly that.

I'll accept that, but no energy flows past the short or open where the
voltage or current is zero which is consistent with p(t) = v(t) * i(t).

No NET energy flows past such a point. Plenty of component energy flows
past the point in both directions as explained in Ramo, Whinnery, & Van
Duzer.

I do understand the derivation from this separation of the going and
coming signals. But I am unable to rationalize this explanation with
the very basic and widely accepted p(t) = v(t) * i(t) and the observed
zero voltages and currents.

You are talking about NET energy and NET power. Drop down one level to
component energy and power and all will become clear - especially if
you take a look at light wave interference patterns.

Do think of that voltage or current 0 at the shorted or open end of the
line. In your model, this voltage or current 0 produces a reflection
while other voltage or current zeroes do not. Is this consistent?

Yes, perfectly consistent. The short or open end of the line is a physical
impedance discontinuity. The other voltage and current zeros are NOT
physical impedance discontinuities. They are a result, not a cause of
anything. You are simply confusing cause and effect.

Consider adding another quarter wave section to the end of the line.
The voltage or current 0 remains and to the left of the original
end of the line nothing changes, but by your model, suddenly there
is no longer a reflection at the original end of the line, but it
has moved to the new end. But the voltage and current distributions
have remained the same. There is no observable difference.

Are you telling us that you cannot locate the physical short or open
at the end of the line and don't observe any difference between a physical
short or open and a piece of continuous transmission line? All you have
to do is open your eyes.
--
73, Cecil http://www.qsl.net/w5dxp
"One thing I have learned in a long life: that all our science, measured against
reality, is primitive and childlike ..." Albert Einstein



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