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Old April 9th 06, 06:44 AM posted to rec.radio.amateur.antenna
Cecil Moore
 
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Default Current across the antenna loading coil - from scratch

John Popelish wrote:
Cecil Moore wrote:
If you want to deny the existence
of forward and reflected current, be my guest.


I deny it. There is only current at a point, just as there is only
water jiggling around under a wave on the ocean.


There is only water juggling under two or more waves in the
ocean. Anyone who has stood on the beach has observed ocean
waves moving in opposite directions.

Your assertion is easy to disprove. In the following example,
the two sources have identical outputs and are phase locked.
They are each equipped with circulators and 50 ohm loads.

Source1---------------50 ohm coax------------------Source2

There is current flowing from Source1 heating up Source2's
load resistor to the tune of I1^2*R. There is current
flowing from Source2 heating up Source1's load resistor
to the tune of I2^2*R. Your denial seems to be a denial
of reality and more of a religious gut feeling than anything
else.

If you disconnect Source2 completely in the example above
the conditions will be the same except Source1 will be
dissipating its own power after a round trip to the open
end and back by the energy waves.

Incidentally, in the double source example above, which
direction is the standing wave current flowing? How could
its unchanging phase be used to measure the electrical
length of the coax?
--
73, Cecil http://www.qsl.net/w5dxp
 
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