On Jun 12, 8:16*pm, walt wrote:
Thank you for the insightful response, Cecil. However, when you go to
the 2-port version I’m unable to correlate that configuration with my
stubbing problem.

The reason that I didn't say anything about the stub example is
because I cannot comprehend it without a schematic. That's why I
changed examples. Do you agree with what I said about my example?
Could you post a schematic of your first example? It is the "series
stub" part that I don't understand. Such is usually called a "series
section" because a stub is usually a parallel dead end open or short
circuit. It is also difficult to comprehend how a two-port analysis
could be done at the stub connection point. Wouldn't that require a
three-port analysis?

We’re considering the source to be an RF power amp, where we know the
output source resistance is non-dissipative, thus re-reflects all
reflected power incident on it. I maintain that the reflection
coefficient at the source is 1.0 because of the total re-reflection
there.

How's about we limit the *initial* discussion and examples to a source
with zero incident reflected power so the source impedance doesn't
matter? IMO, a two-port analysis of a Z0-match point will reveal the
main ingredients of the energy flow.

However, mathematical experts say that the equation is correct, saying
that rho_¬’s’ cannot be equal to 1.0, because the virtual open circuit
was established by wave interference, not a physical open circuit.

A one-port analysis cannot tell the difference between wave
interference and reflections. You are correct that the reflection
coefficients are not necessarily the same between a one-port analysis
and a two-port analysis. Your "mathematical experts" don't seem to
understand the limitations of a one-port analysis. It's akin to not
knowing what is inside a black box, i.e. one cannot tell the
difference between a resistor and a virtual resistance. However, with
a two-port analysis, one can tell the difference. It appears that your
"mathematical experts" are insisting on a two-port analysis such as
provided by the s-parameter equations:

b1 = s11*a1 + s12*a2

b2 = s21*a1 + s22*a2

http://www.sss-mag.com/pdf/an-95-1.pdf
--
73, Cecil, w5dxp.com