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Old January 3rd 08, 08:49 PM posted to rec.radio.amateur.antenna
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Default Standing-Wave Current vs Traveling-Wave Current

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.
--
73, Cecil http://www.w5dxp.com
 
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