Interesting antenna. Semi-fractal??
 

http://us.gizmodo.com/gadgets/gadget...org-156502.php

Interesting antenna. Semi-fractal??
 

K7ITM wrote:
http://us.gizmodo.com/gadgets/gadget...org-156502.php

Do you have any idea what the performance specs are for this antenna?

Interesting antenna. Semi-fractal??
 

John Popelish wrote:
K7ITM wrote:
http://us.gizmodo.com/gadgets/gadget...org-156502.php

Do you have any idea what the performance specs are for this antenna?

No idea at all. A friend knows I'm interested in antennas, and sent me
the link simply as something interesting. Since things are WAY too
quiet here today, I thought I'd post it. ;-)

Were you around this group during the Great Fractal Antenna Debates a
couple years ago, John? You've undoubtedly noted references to them in
some of the postings in the recent interminable threads.

Cheers,
Tom

Interesting antenna. Semi-fractal??
 

On 14 Apr 2006 16:23:55 -0700, "K7ITM" wrote:


John Popelish wrote:
K7ITM wrote:
http://us.gizmodo.com/gadgets/gadget...org-156502.php

Do you have any idea what the performance specs are for this antenna?

No idea at all. A friend knows I'm interested in antennas, and sent me
the link simply as something interesting. Since things are WAY too
quiet here today, I thought I'd post it. ;-)

Hi Tom, John,

The form shown is a variation of what I called the triangle sweep some
8 years ago. I fed it dipole style, they do similar sections in
parallel against a ground plane.
http://www.qsl.net/kb7qhc/antenna/fr...n/3dtri-42.htm
The following page shows one construction out 5 iterations in a
planar, not 3 space form:
http://www.qsl.net/kb7qhc/antenna/fr...weep/index.htm
There are as many variations as could be expected, but calling them
"fractal" strains the definition - especially when the debate got down
to claims that every good conventional antenna design was an hidden
example of fractal principles.

If you drill down through the links, they are challenging Walt's
Quadrafilar design of some 35 years ago. Curiously, one frequency
sweep of the "better" of two models had pretty crummy SWR. I couldn't
find the design goal.

73's
Richard Clark, KB7QHC

Interesting antenna. Semi-fractal??
 

K7ITM wrote:
John Popelish wrote:
K7ITM wrote:
http://us.gizmodo.com/gadgets/gadget...org-156502.php

Do you have any idea what the performance specs are for this antenna?

No idea at all. A friend knows I'm interested in antennas, and sent me
the link simply as something interesting. Since things are WAY too
quiet here today, I thought I'd post it. ;-)

I searched Google for [borg antenna design nasa] and found lots of
other pictures, including one that has 4 uneven Y elements arranged in
a rotationally symmetrical pattern. It appears to be a monopole
equivalnet (perhaps with circular polarization endward).
http://www.nasa.gov/centers/ames/new.../computer.html
http://www.nasa.gov/centers/ames/new...nna/video.html

Were you around this group during the Great Fractal Antenna Debates a
couple years ago, John? You've undoubtedly noted references to them in
some of the postings in the recent interminable threads.

Sorry to say, I missed that.

Interesting antenna. Semi-fractal??
 

Richard Clark wrote:
On 14 Apr 2006 16:23:55 -0700, "K7ITM" wrote:


John Popelish wrote:

K7ITM wrote:

http://us.gizmodo.com/gadgets/gadget...org-156502.php

Do you have any idea what the performance specs are for this antenna?

No idea at all. A friend knows I'm interested in antennas, and sent me
the link simply as something interesting. Since things are WAY too
quiet here today, I thought I'd post it. ;-)


Hi Tom, John,

The form shown is a variation of what I called the triangle sweep some
8 years ago. I fed it dipole style, they do similar sections in
parallel against a ground plane.
http://www.qsl.net/kb7qhc/antenna/fr...n/3dtri-42.htm
The following page shows one construction out 5 iterations in a
planar, not 3 space form:
http://www.qsl.net/kb7qhc/antenna/fr...weep/index.htm
There are as many variations as could be expected, but calling them
"fractal" strains the definition - especially when the debate got down
to claims that every good conventional antenna design was an hidden
example of fractal principles.

If you drill down through the links, they are challenging Walt's
Quadrafilar design of some 35 years ago. Curiously, one frequency
sweep of the "better" of two models had pretty crummy SWR. I couldn't
find the design goal.

73's
Richard Clark, KB7QHC

Ut Oh! Your in trouble now.... :)...

Interesting antenna. Semi-fractal??
 

Semi-fractal antenna developed by '...a "Borg computer
collective."'

Would that be anything like "Fractal Coded Genetic Optimization
(FRAGO)"?

http://fractenna.com/capabilities/capabilities.html

Interesting antenna. Semi-fractal??
 

http://www.nasa.gov/centers/ames/res...erse/borg.html