On Mon, 07 Jun 2004 15:28:01 -0500, Cecil Moore wrote:

Walter Maxwell wrote:
But when the system is matched the reflection coefficient is 1.0.

Not in an S-parameter analysis which is essentially what Dr. Best is doing.
He is dealing with the PHYSICAL reflection coefficient, (Z2-Z1)/Z2+Z1), not
the virtual reflection coefficient based on reflected power being zero. This
may be the source of the misunderstanding between you two. His reflection
coefficients, like the S-parameter reflection coefficients, don't change from
startup to steady-state. They remain constant even when no signal is present.

General superposition theory does NOT require
that the forward voltage be the vector sum of the individual forward-traveling
voltages.

Superposition of two individual forward-traveling voltages requires that the
sum be the vector sum as long as the interference energy requirements are met.

When are you going to understand that that superposition yields the standing
wave, NOT the forward wave? I've told you this over and over again, but you
apparently aren't listening.

I am listening, Walt, and still telling you that you are wrong about that
concept. Superposition of two waves traveling in opposite directions yields
the standing wave. Superposition of two coherent waves traveling in the same
direction yields DESTRUCTIVE/CONSTRUCTIVE INTERFERENCE, not standing waves.

Cecil, please go to Johnson as I pointed out earlier and become educated as to
where Steve screwed up.

I know where Steve screwed up, Walt, and he did screw up. But it wasn't in the
area of an S-parameter analysis in the forward direction. It was in the rearward
direction that he screwed up royally.

Cecil, you're not even close to knowing where Steve screwed up. And you won't
know until you follow my directions and go to Johnson and read what I said to
read. I can't understand why you refuse to go in that direction. Because you
refuse we're going around in circles. This has to stop.

What Johnson and I are trying to tell you is that the superposition of the
source voltage and the re-reflected voltages DO NOT establish the forward
voltage. Steve used Johnson's Eq for determining the standing wave voltage at
any point on the line incorrectly as the forward re-reflected voltage wave V2.
THIS IS WHERE HE SCREWED UP, CECIL., SCREWING UP THE ENTIRE ARTICLE !!

Walt