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.

In the afore-mentioned example, the four powers associated with the four
superposition voltages are P1, P2, P3, and P4. P1=75W, P2=8.33W, P3=25W,
and P4=25W.

P1+P3 = 100W = generated power

P2+P4 = 33.33W = power reflected from the load

Dr. Best tell us that 75W+8.33W+2*SQRT(75*8.33)=133.33W and that is
mathematically true.

What Dr. Best doesn't tell us is that 2*SQRT(75*8.33) = P3+P4 and that
they are the interference component powers from classical optics theory.

You are grouping the powers together in this manner, (P1+P3)+(P2+P4)=133.33W
and that is perfectly true mathematically.

Both of you are doing essentially the same thing but neither one of you
realizes it. You guys are two inches apart and don't know it. It feels like
I am listening to two flatlanders argue about the third dimension.
--
73, Cecil http://www.qsl.net/w5dxp



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