[Antennas] Fractal Loop

Sun Feb 4 09:06:22 EST 2018

The loop was laid out as a receive antenna for a nearby amateur radio friend. His intention was for DX on the broadcast band. It was based not upon frequency, but rather the approximate available size in his backyard. 
For frequency, one can put it in the orientation and height desired and scale it for frequency and run it to observe the values generated. I don’t know the characteristics of most modeling programs, but rescaling the size is pretty easy with 4nec2. 
I may work with it some later today. If I come up with anything useful, I’ll post.
There are about 500 linear feet of wire in the model posted. For reference, a 40 Meter full wave loop contains about 140’ around the perimeter.
There is some information on beams made with such a layout. There’s a couple of nice photos of a three element 10 meter beam to be found.
The shape does not exhibit much in the way of gain in a single element, but is may be useful for compactness for antennas like cubical quads. 
Resizing it based on the overall length (~500’) to a length that would be in the ballpark of a full-wave loop for a given frequency might provide a good starting point.
Please post observations of such activity you might perform.

Best,
Dick – KA5KKT 

From: djringjr at gmail.com [mailto:djringjr at gmail.com] On Behalf Of D.J.J. Ring, Jr.
Sent: Saturday, February 3, 2018 4:03 PM
To: Dick Dickinson
Cc: Reflector Antennas Qth.net
Subject: Re: [Antennas] Fractal Loop

What frequency or frequencies is it designed for and have you used it yet?

I don't know anything about this type of antennas, but if they work, it's very interesting. I know that they're controversial with some saying they work, others that it's a scam.

But they said Marconi was a scam artist, and I know he was right, you can signal over the horizon.

73
DR
N1EA

On Sat, Feb 3, 2018 at 12:06 PM, Dick Dickinson <softblue at windstream.net> wrote:
Offered for use 'as is' and with no commentary in the file is this model of
a Fractal Loop. It may not meet proportions that might be mathematically
defined as 'fractal.' All legs are more or less equal in length. This is a
text file which I assume can be copied and pasted into NEC type editors.
This particular on is 'on ground' (actually a small fraction of a foot
above) and is 50' on a side, overall. I can probably be rescaled and tilted
into whatever axis.
This file was created using 4nec2.
I'm attaching a .txt file. If it doesn't come across, will the moderator
please remove it and send me a note. I'll then post it in text in the body
of an email.
Best,
Dick - KA5KKT
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