On Jun 24, 8:59*pm, Keith Dysart wrote:
But then what explains the reflection at the generator that presents
Z0 to the line?

Your error is in assuming it is a reflection. It is NOT a reflection
which, by definition, involves one wave. It is a redistribution of
energy due to superposition which, by definition, involves two or more
waves. In a system designed to eliminate reflections at the source,
ALL of the redistribution of reflected energy back toward the load is
due to superposition accompanied by interference. From the FSU web
site:

"... when two waves of equal amplitude and wavelength that are 180-
degrees ... out of phase with each other meet, they are not actually
annihilated, ... All of the ... energy present in these waves must
somehow be recovered or redistributed in a new direction, according to
the law of energy conservation ..."

Nothing said about *reflection* (involving a single wave). It is all
about the meeting (superposition) of two waves which can cause the
redistribution of energy. It may look somewhat like a reflection but
it is technically NOT a reflection.
--
73, Cecil, w5dxp.com