View Single Post
  #62   Report Post  
Old November 21st 08, 03:19 PM posted to rec.radio.amateur.antenna,sci.electronics.design
GregS[_2_] GregS[_2_] is offline
external usenet poster
 
First recorded activity by RadioBanter: Nov 2007
Posts: 26
Default Log-Periodic Antenna Design

In article tonline, Roy Lewallen wrote:


Rich Grise wrote:
On Thu, 20 Nov 2008 15:30:26 -0800, Roy Lewallen wrote:
GregS wrote:
Ever hear of the BOW TIE. Its a sort of Fractal antenna. Having a wide
band. It could be improved by making it a full fractal.
That's interesting. In what way(s) is it improved by making it fractal?
How much is the improvement? Can you point me to a reference about this
which gives some quantitative data?



http://www.google.com/search?hl=en&q...oogle+ Search
&aq=f&oq=

Hope This Helps!
Rich


Sorry, it doesn't. Among the claims, trolls for investors, and
testimonials, where is the quantitative data showing that a fractal
antenna is in any way better than a bow tie, in what ways, and how much?
In other words, exactly where is the evidence on which you based your
statement?

Roy Lewallen, W7EL


I don't have data. I think the home made TV antenna in the video, is very much like a bow tie,
and could have better bandwidth by making the elements different lengths. The gain factor
is going to be narrow band since the feed length is constant. I would have also used 12ga
copperweld or solid copper. You can also get closer to fractal by using many more different
sized elements.

greg