Thread: folded dipole
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Old February 10th 06, 07:45 PM posted to rec.radio.amateur.antenna
Cecil Moore
 
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Default folded dipole

Richard Harrison wrote:
The actual impedance of the 1/4-wave folded dipole is an inverse
function of the wire diameter. It can be chosen to present 6000 ohms.
If the 1/4-wave folded dipole is a little short of 1/2-wave around its
perimeter, it presents an inductive reactance. If a little longer
electrically than 1/2-wave around, it presents a capacitive reactance.


Using EZNEC, I just did a frequency sweep on a #14 folded dipole
around half its design frequency. There were no apparent resonant
effects. How big does the wire have to be for a 130ft folded dipole
to exhibit a feedpoint impedance of 6000 + j0 ohms on 160m? Why is
no one using such an antenna on 160m?
--
73, Cecil http://www.qsl.net/w5dxp