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Old April 9th 06, 06:48 PM posted to rec.radio.amateur.antenna
Cecil Moore
 
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Default Current across the antenna loading coil - from scratch

John Popelish wrote:
He seems to confuse energy in the wave traveling along a conductor with
the current it induces along that conductor, as it travels.


It's not confusion, John. It is engineering convention. Every
engineering reference book I have refers to current flow at
one point or another. Most of them also refer to power flow.
"Transmission Lines and Networks", by Walter C. Johnson even
refers to "The Conservation of Power Principle". Since there
is no such thing as an RF battery, we know exactly what Mr.
Johnson meant.

You are discussing the conventions used by physicists. Since
this is basically an RF engineering convention newsgroup, you
need to adjust your concepts accordingly or tell everyone that
you are nit-picking based on the conventions from the field of
pure physics.

In the engineering world: Power companies generate power and
transfer the power to the consumers over transmission lines.
RF transmitters generate power which is transferred over the
transmission line and radiated by the antenna.

There is always a convention for placing an arrow on a wire
to indicate direction of current flow, whether RMS AC or DC
or RMS RF. The AC conventions are left over from the DC
conventions. If you are trying to change those conventions,
please say so.

Food for thought: If an electron can pass through two different
holes at the same time, can it also travel in two directions
at the same time? Quantum physics says that is a possibility.

Is that because the result is not a pure standing wave (superposition of
two equal and oppositely traveling waves), but a superposition of a pair
of traveling oppositely traveling waves of different amplitudes?


Yes, but the definition of a standing wave is that the two waves
are of equal amplitudes. The wave you are describing is a hybrid
wave containing both a traveling wave and a standing wave. Any
real-world system contains hybrid waves in various ratios of
traveling waves to standing waves.
--
73, Cecil http://www.qsl.net/w5dxp
 
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