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Old November 5th 07, 02:18 PM posted to rec.radio.amateur.antenna
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First recorded activity by RadioBanter: Mar 2007
Posts: 3,521
Default question about wire antenna and tuner

Sal M. Onella wrote:
"Cecil Moore" wrote in message
news
Roy Lewallen wrote:
Yes, this misconception will never die. Is it really worth the trouble
continually trying to contradict it?

Not if all you do is trade one old-wives tale
for another.


It's hardly an old wives' tale.


1. The original old wives tale is that reflected power
*always* causes the source dissipation to increase,
even when it is a voltage source.

2. The subsequent old wives tale is that reflected
energy always ends up being radiated by the antenna.

Examples of decreased dissipation in the voltage source
in the presence of reflections proves #1 wrong.

Examples of increased dissipation in a current source
in the presence of identical reflections above proves
#2 wrong.

The power density in reflected waves is proportional to
ErefxHref and *CANNOT* be zero. Where that energy goes
obeys the conservation of energy principle. Anyone who
says all energy winds up being radiated by the antenna
is simply ignorant even if portraying himself as a guru.
--
73, Cecil http://www.w5dxp.com
 
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