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Old April 21st 06, 01:41 AM posted to rec.radio.amateur.antenna
John Ferrell
 
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Default EZNEC Vertical interpretation

Thank you, I get that!
On Thu, 20 Apr 2006 13:12:20 -0700, Roy Lewallen
wrote:



The loss is due solely to the inductor's resistance -- you'll get the
same result by replacing the inductor with a 3 ohm resistor. The amount
of gain reduction due to the inductor will get worse and worse as the
antenna gets shorter and shorter, for two reasons. The first is that the
antenna's radiation resistance drops as it gets shorter, so the inductor
loss becomes a greater fraction of the total feedpoint resistance. The
second is that you need a larger inductor for a shorter antenna and,
assuming a constant Q, that means more inductor resistance.

. . .


Roy Lewallen, W7EL

John Ferrell W8CCW