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Old April 28th 07, 01:38 AM posted to rec.radio.amateur.antenna
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First recorded activity by RadioBanter: Mar 2007
Posts: 3,521
Default Rotational speed

Roy Lewallen wrote:
Now if we could just get a certain individual to either stay on the
rotor or the stator and not keep jumping back and forth without telling
anyone or even realizing it himself. . .


I apologize for any confusion I may have created. All of my
phasors are referenced to the feedpoint current at zero
degrees, which is what EZNEC does.

If the feedpoint forward current is at zero degrees, the
forward current 45 degrees away will lag by 45 deg.
The reflected current 45 degrees away will lead by 45 deg.
The forward current 90 degrees away will lag by 90 deg.
The reflected current 90 degrees away will lead by 90 deg.
Thus the forward current and reflected current phasors
are rotating compared to the feedpoint reference.

The standing wave current phase, referenced to the feedpoint
phase, changes hardly at all. The standing wave current
phase is essentially the same all up and down the dipole.
The standing wave current phase is essentially the same at
the bottom and top of a loading coil. The standing wave
current phase is essentially unrelated to the position
on the antenna or loading coil. Standing wave current
cannot be used to determine the phase shift through
a loading coil.
--
73, Cecil http://www.w5dxp.com
 
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