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Old December 24th 07, 01:23 PM posted to rec.radio.amateur.antenna
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First recorded activity by RadioBanter: Jul 2006
Posts: 326
Default Standing-Wave Current vs Traveling-Wave Current

On *The voltage is
indeed real, as i have said. *you can measure the 'standing' wave voltage,
that has been known for a long time... but the effects are NOT due to power
in standing waves.-


OK, that was the least word infested post I can find...

1. A standing wave is not 'standing' in time... It phase rotates at
the same rate as the excitation frequency...
If the phase is rotating then V and I are changing - else Feynman is
rotating in his grave...
To do so requires the surface electrons at that point on the line to
oscillate back and forth or whatever the heck surface electrons do at
rf frequency... To excite these electrons from one energy state to
another requires power/energy/joules/whatever-you-want-to-call-it...

2. It is real because I can measure it with a volt meter and I can
extract power from it with a lamp, simultaneously..

Also: it will perforate the insulating jacket on the line if the power
level is high enough... I used to maintain a herd of 100KW RF
generators, and they would blow a hole through the side of a quarter
inch thick copper bar in an instant when the load failed in my
youthfull ignorance, I thought it was the standing wave RATIO that
blew the line, silly me ...



Try this thought... A Tesla coil (automobile spark coil) with no load
on the output is all standing wave voltage and no current - so
according to some has no power... Touch your finger to it...
Also try: If an open ended line has 100.000 volts of DC on it, the
standing wave DC contains no power because the current is zero?

And, for whoever it was accused me of bashing someone - reread my
post, carefully.... I absolutely do not bash or flame anyone...

cheers ... denny
 
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