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Old October 30th 03, 04:48 AM
Cecil Moore
 
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Reg Edwards wrote:
When the length of a loading coil is short in comparison with the overall
height of the antenna, certainly in comparison with a wavelength, the
current into one end can be assumed, with negligible error, to be equal to
that which comes out of the other end as with any other coil in an L,C,R
network analysis.


But Reg, why do you think they call it a standing wave antenna? Would
you also assert that the current is equal when a coil is installed in
a transmission line with reflections? If it weren't for reflections
from the open ends of a dipole, the feedpoint impedance would be
hundreds of ohms. It's the reflections that reduces the feedpoint
impedance to ~70 ohms.
--
73, Cecil http://www.qsl.net/w5dxp



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