On Apr 20, 12:38 pm, Cecil Moore wrote:
Keith Dysart wrote:
All true, and as long as you think of voltage and current waves
you won't get into trouble.

I don't recall Maxwell's equations relying on "voltage and
current waves".

You have that right. Just some simple differential equations.

The key point is that the line conditions did not change, so the
same reflections must be occuring and yet your explanation
claims that sometimes nothing is reflected and sometimes
all is reflected.

If you put two signal generators equipped with circulator
loads at each end of a transmission line, there are absolutely
no reflections anywhere. Yet there is a forward wave and a
reverse wave. We can cause a reverse wave when "sometimes
nothing is reflected and sometimes all is reflected". The
transmission line will not know the difference.

Rather a non-sequitor since we were discussing what was happening
at the generator end, but non-the-less true and demonstrates again
one of the greater weaknesses in your learnings. You really do need
to realize that there is no need for a circulator. Once you are beyond
this, many things will fall into place.

Did you read the same paper I read? I recall that the claim was a
conjugate match of the effective impedances AFTER tuning. The
systems under discussion here have not been tuned for maximum
power transfer.

The existence of a conjugate match is irrelevant to our
discussion. All that is relevant to our discussion is
that the reflected waves does not see the generator
source impedance.

There you go. Still stuck. You really should crack the books in search
of a reference to support your contention. You won't find one.

And the relevence of the conjugate match is that the conjugate
is the generator source impedance and it is the impedance that
the wave incident upon the generator sees.

Oh darn. A typo. I know it will be quoted over and over in subsequent
posts. So be it.

Keith, arrogant omniscient beings, as you present yourself
to be :-), do not make typos.

Of course not. But when the instaneous power is 0 for all instants
then no energy can be flowing.

The instantaneous power is zero every 1/2WL in an EM wave.
Therefore, according to you, EM waves cannot transfer energy
or power. Good luck on that one.

I have certainly never said that. If you could point me to the words
that misled you into thinking that, I will attempt to clarify your
misunderstanding.

There is quite a difference between the instanteous power being
occasionally zero and being zero for all instances. Real enough?

If the instantaneous power is zero for all space and time,
an EM wave cannot exist.

My point exactly.

....Keith