k4wge wrote:


An 18 page paper entitled

FRACTAL ANTENNAS
Introduction to fractal technology and presentation of a fractal
antenna adaptable to anytransmitting frequency - The "FRACTENT"
By Werner Hödlmayr, DL6NDJ
January 2004

Can be downloaded at www.antenneX.com

in fact, that was the article that raised all the questions ;-)
I found it interesting, but wanted to know if hams are really using it!

Kind regards,

Jan, ON5DOA

Jan Van Belle wrote in message ...

I found it interesting, but wanted to know if hams are really using it!

Kind regards,

Jan, ON5DOA

Have you looked at the W0FMS page at

http://www.fredspinner.com/W0FMS/fractant/

Fred says, "The purpose of this web page is to further explain the
details of the rather contraversial Fractal Antenna. This antenna uses
a fractal shape to load a radiating element, allowing, according to
Nathan (Chip) Cohen, N1IR 2x to 4x reduction in size with little loss
in gain and/or F/B. I haven't tried this antenna yet, which is patent
pending from Fractal Antenna Systems, Inc. (Fractenna), so I claim
nothing else than to have deciphered the (IMHO) rather cryptic
building instructions in the
http://www.fractenna.com/ham/hampage1.html
page describing a 10-m 2 element quad fractal antenna. In order to
avoid potental criticism, I am stating for the record that the
instructions on the site are adequate for assembling this antenna. I
am also stating that for most, it is very hard to understand these
directions without a starting point of reference. It took me a couple
of hours to figure it out, and I'm a EE... "

in fact, that was the article that raised all the questions ;-)
I found it interesting, but wanted to know if hams are really using it!

Kind regards,

Jan, ON5DOA

Not to my knowledge, Jan.

The presently and easily available (that is, free) info on fractal antennas
for hams is poor in content and often factually inaccurate, in my opinion, and
this is likely to remain so. In the world we live in today, this makes a lot of
a sense in its own quirky fashion.

Commercial uses are a different story, however. Of course, that's not what this
NG is about.

When hams switch to software radios in a big way then fractal antennas targeted
to hams might be worth making more widely known. With some luck, they'll be a
few of us 'hams' left then!

73,
Chip N1IR

Fractenna wrote:


When hams switch to software radios in a big way then fractal antennas targeted
to hams might be worth making more widely known. With some luck, they'll be a
few of us 'hams' left then!



Maybe this is a naive question, but how does an antenna, fractal or
otherwise, know what kind of transmitter is driving it? Why are
software radios more suited to this design?

vy 73

Andy, M1EBV

Maybe this is a naive question, but how does an antenna, fractal or
otherwise, know what kind of transmitter is driving it? Why are
software radios more suited to this design?

vy 73

Andy, M1EBV


True frequency and waveform agility is the goal in SDR . Wideband, or
controlled multiband, is needed. Ham requirements are well met at present with
a variety of antenna designs that are nearly periodic in a fairly narrow
frequency coverage, a fairly easy problem to solve.
73,
Chip N1iR

Translation: fractured antennas are horse****.

"Fractenna" wrote in message
news:20040609122135.15248.00000404@mb-
True frequency and waveform agility is the goal in SDR . Wideband, or
controlled multiband, is needed. Ham requirements are well met at present
with
a variety of antenna designs that are nearly periodic in a fairly narrow
frequency coverage, a fairly easy problem to solve.
73,
Chip N1iR

On Sat, 12 Jun 2004 18:45:30 -0700, "CW"
wrote:
Translation: fractured antennas are horse****.
Unfortunately, that association is an aspersion upon horse****. ;-)

LOL!

"Richard Clark" wrote in message
...
On Sat, 12 Jun 2004 18:45:30 -0700, "CW"
wrote:
Translation: fractured antennas are horse****.
Unfortunately, that association is an aspersion upon horse****. ;-)

In message , Richard Clark
writes
On Sat, 12 Jun 2004 18:45:30 -0700, "CW"
wrote:
Translation: fractured antennas are horse****.
Unfortunately, that association is an aspersion upon horse****. ;-)

Not a good analogy. Horse**** can be quite useful (ask any organic
gardener).
Ian.
--