[Elecraft] Feeding a Half-Wave Dipole Topic

[Jim Brown]

On 10/30/2021 4:37 PM, Dick Bingham wrote:
> Check out this antenna suggested by K2KQ ===>
> 
> *https://www.yccc.org/Articles/double_l.htm

That's an interesting concept, and I'm not at all surprised that it can 
work quite well -- IF local soil conductivity is good. But vertically 
polarized antennas experience ground loss in the far field if soil 
conductivity is poor. Note that this loss is NOT from the soil under 
radials.

Here two other takes on things we can build. Both are single-band, 
center-fed resonant dipoles.

http://k9yc.com/VerticalDipole.pdf
http://k9yc.com/80M-FDVertical.pdf

The Cushcraft R-series, HyGain AV-series, and Gap Titan multi-band 
verticals are  dipoles with a combination of loading and matching networks.

When N6BT owned Force 12 and was the design engineer, he designed 
several loaded vertical dipoles, and he's still designing and building 
vertical dipoles doing biz as Next Generation Antennas. Tom is an 
excellent designer.

https://nextgenerationantennas.com/bravo-vertical-antennas

None of these antennas need or benefit from radials. All need good soil 
conductivity to be very effective.

73, Jim K9YC