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Old November 17th 07, 11:37 PM posted to rec.radio.amateur.antenna
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Posts: 644
Default Superposition

On Nov 17, 10:36 am, Cecil Moore wrote:
K7ITM wrote:
In typical Cecil fashion, you trimmed out the only part I really cared
about having you answer: "Assuming the two "waves" existed
independently at some points in space, you'll have to first tell us
_exactly_ what was done to combine them into one wave."


They were confined to a transmission line. Coherent
waves traveling in the same direction in a transmission
line are forced to also be collinear. Unlike space, a
transmission line forces collinearity upon the EM waves.
But the same thing happens at a 1/4WL thin-film non-
reflective coating on glass. Assuming one brings the
Poynting vectors into collinearity, one can see what
is happening athttp://www.w5dxp.com/thinfilm.gig
--
73, Cecil http://www.w5dxp.com


Of course it was obvious from the base posting in this thread that the
"waves" must be on a TEM transmission line. But you still haven't
said anything about HOW you launched two distinct waves but got them
to combine into one.

You're working WAY too hard on this one if you have to bring Poynting
vectors into it.
 
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