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Old August 27th 03, 01:49 AM
W5DXP
 
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wrote:
When excited by a sinusoid, no energy moves at the quarter wave points
where the voltage or current is always 0.


You keep saying that and it keeps being a false statement. There is
absolutely nothing magic about sinusoids.

"we know" is rather strong. I would strongly suggest that no energy
crosses those points in the line where the voltage and current are
always zero since p(t) is always zero at these points.


What about Ramo and Whinnery's forward Poynting vector and reflected
Poynting vector? Why do you choose to ignore them?

Not necessarily. Only once the line has been charged, does the energy
move back and forth between the quarter wave points, while not
crossing them.


That has been shown to be a false assertion regarding component waves.
There is no impedance discontinuity to cause any reflections. Therefore,
the waves do not move back and forth. Do you really believe that the
energy in a bright interference ring is trapped inside the ring? Get
serious!
--
73, Cecil
http://www.qsl.net/w5dxp



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