wrote:

Cecil Moore wrote:

1. The power reflected from the network input back toward the source. |s11|^2

2. The power transmitted through the network port toward the load. |s21|^2

3. The power re-reflected from the network output back toward the load. |s22|^2

4. The power transmitted through the network port toward the source. |s12|^2

These are the four powers you calculated and you consider only |s12|^2 to
be forward power. That is an error. |s22|^2 is also forward power. These
two forward power flow vectors have to be added to obtain the total
forward Poynting vector. I do believe that clears up the confusion.

Was not the discussion about powers on the source side?
Is not |s22|^2 on the load side?

Roy apparently doesn't realize it, but when he introduced 'x' into his
equations, he introduced 2-port analysis terms so, in his math, there are
indeed two powers existing on the load side. That's what got him confused
and he forgot to include those terms in his forward power and reflected
power, i.e. his rP is not all of the reflected power and his fP
is not all of the forward power. It's an easy mistake to make. But to
compound his mistake, he then combined those two terms on the load side,
one reflected and one forward, into one term so it is difficult to determine
which way its power flow vector points.
--
73, Cecil http://www.qsl.net/w5dxp



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