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Old October 3rd 03, 03:27 AM
Cecil Moore
 
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Jim Kelley wrote:
I just showed you how characteristic impedances are used to calculate
the reflection coefficient at '+'. But you can wish it into the
cornfield if you like, Anthony. :-)


Absolutely no chance that you are simply wrong?

(150-50)/(150+50) is NOT rho.


Is it the reflection coefficient for a 50 ohm to 150 ohm impedance
discontinuity?


It is the 's11' reflection coefficient for that impedance discontinuity.
It is NOT the 'rho' at '+' unless the signals are orthogonal to each
other at '+'. Chances are they are not orthogonal.

I was mistaken to call that quantity "rho" in my article.
That quantity that I called "rho" is actually 's11' and I need to
update my article.


Since S-parameters were never even mentioned in your article, updating
it seems an understatement.


In my article, I called (Z1-Z0)/(Z1+Z0) the RHO(fv) and said it was
equal to S11. I should just have called it 'S11'. And I just checked
my web page. S11 is definitely mentioned in my article.
--
73, Cecil http://www.qsl.net/w5dxp



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