[Antennas] RE: no radial vertical antennas

2002年4月17日 10:36:39 EDT

[email protected] writes:
<< A true no radial vertical antenna is very
 simply realized by using 1/2 wavelength
 of tubing insulated from the ground, and
 feeding it at the bottom with an L/C matching
 network. Rick N6RK >>
--I i think maybe you could also 
shorten this by using the 'helical antenna'
idea, and using around 1 wavelength of 
actual wire on the form, to achieve 1/2
wave effective resonance. I've not done
this yet, but i've been eager to try it for
some time, to get away from radials.
Or actually better maybe, a helically
wound vertical antenna for an effective 1/2
wavelength, with coax feed in the middle,
and the coax running down inside the 
tubing.
Hue Miller