Cecil Moore wrote:
Gene Fuller wrote:
http://www.ecs.umass.edu/ece/labs/an...parameters.pdf

Wow! You missed again! And I thought that you actually understood what
s-parameters are all about.

Get a clue. None of your rantings say anything about the behavior of
waves on the transmission line. As usual you keep ducking the question
by answering a different one.

HP would be interested in knowing your theory that the
s-parameter equations cannot be used on a transmission
line. How can you possibly be that ignorant?

Actually, s-parameter equations are an ideal way to
analyze an impedance discontinuity in a transmission
line since the voltages are normalized to SQRT(Z0).
Squaring the normalized voltages yields power.

----50 ohm line--+--1/2WL 300 ohm line--50 ohm load
a1--|--b2
b1--|--a2

b1 = s11*a1 + s12*a2 b2 = s21*a1 + s22*a2

|a1|^2 is forward power, |b1|^2 is reflected power
|b2|^2 is forward power, |a2|^2 is reflected power

Squaring the s-parameter equations yields the power
density (irradiance) equation from the field of optics.
I'm sorry that technical fact upsets you so.

It's a swing and a miss. Strike three! You're out!

The entire point of s-parameter analysis is that the "network" can be
treated as a black box, characterized by the various parameters at the
ports. How does that work to analyze what is happening *inside* the box,
such as somewhere along the transmission line?

73,
Gene
W4SZ