Isn't a log-periodic antenna "fractal" in the sense that it is
scale-independent over a wide range of frequencies? The newer antennas seem
to be different only in that they are two-dimensional while LPA's are
essentially one-dimensional.
Inquiring minds, etc...
73 Martin AA6E
On Sat, Feb 20, 2010 at 1:02 PM, Neal Campbell <nealk3nc@gmail.com> wrote:
> The greatest story on this is from a show on PBS about Fractal Geometry.The
> first half of the show is about how skeptical and belittling the
> mathmatical
> world was about fractal geometry when it could be proven over and over and
> seen recurring everywhere in nature.
>
> The second half of the show was about the practical applications of
> fractals
> and they spent quite a bit of time telling the story of Nathan Cohen who as
> a ham started to wonder if antennas would benefit from fractal design and
> wrote a paper in Communications Quarterly. He kept going, finally starting
> up the Fractal Antenna company which sells antennas it seems in the cell
> phone market, etc.
>
> Its a great great show.
>
> Neal Campbell
> Abroham Neal Software
> www.abrohamnealsoftware.com
> (540) 645 5394 NEW PHONE NUMBER
>
> Amateur Radio: K3NC
> Blog: http://www.abrohamnealsoftware.com/blog/
> DXBase bug reports: email to cases@dxbase.fogbugz.com
> Abroham Neal forums: http:/www.abrohamnealsoftware.com/community/
>
>
>
>
>
> On Sat, Feb 20, 2010 at 12:40 PM, Vic Watkins <watkins.vic@comcast.net
> >wrote:
>
> > The web site was up and working yesterday. http://www.fractenna.com
> >
> > Vic (W7VLW)
> >
> > On 2/20/2010 6:15 AM, TexasRF@aol.com wrote:
> > >
> > > You will find information about Fractal Antennas in back issues of Ham
> > > Radio Magazine. CQ Magazine offers CD ROM copies I believe.
> > >
> > > 73,
> > > Gerald K5GW
> > >
> > >
> > > s In a message dated 2/20/2010 5:03:32 A.M. Central Standard Time,
> > > Jim.thom@telus.net writes:
> > >
> > > Some time back there was an article in QST about Fractal Antennas and
> I
> > > believe they used one on 10 meters.
> > > So far, searches find listings, but the pages have been blank.
> > >
> > > They'd be a limited space antenna with negative gain and are more
> often
> > > associated with cell phones
> > >
> > > Anything happening along this front and where did all the examples go?
> > >
> > > 73
> > >
> > > Roger (K8RI)
> > > ## Fractal ant's were the subject of a big article in Scientific
> > > American many year's ago. Cell co's were all going to use em,
> greatest
> > thing
> > > sincesliced bread, 1.2 deg BW, etc. Fractal ants are a myth, just
> like
> > the
> > > 'air car'. Jim VE7RF
> > > _______________________________________________
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--
Dr. Martin S. Ewing, AA6E
Member IEEE, URSI, AAS, ARRL
Branford, Connecticut
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