Jeff Liebermann wrote:
On Sun, 21 Feb 2010 21:44:56 -0800 (PST), Art Unwin
wrote:

On Feb 21, 11:18 pm, Jeff Liebermann wrote:
On Sun, 21 Feb 2010 19:45:03 -0800 (PST), Art Unwin

wrote:
Model of 2 element multi polarization.
http://users.sdsc.edu/~unwin/art/Picture6.png
http://users.sdsc.edu/~unwin/art/Picture7.png
http://users.sdsc.edu/~unwin/art/Picture10.png
http://users.sdsc.edu/~unwin/art/Picture11.png
I don't see a model. There is no .EZ, .GAA, .N4W or .NEC file for me
to play with and tear apart. I can't even tell what the antenna looks
like from what you've posted.

You have two elements each located with x,y and z co ordinates at
each end, so you make your own file to suit the program you intend to
use or is available.

I do not have two elements. I can't located them in x, y, or z
because you didn't specify any such coordinates. I can make a
suitable NEC deck, but *YOU* need to supply the numbers.


Jeff

I hate to support Art, but he did give the endpoint data in picture6. I
modeled it with eznec+ 5 and the pattern and gain are reasonably close
to what he shows in the other "pictures". Close considering he appears
to be using mininec and if he includes conductor loss and real ground
it's off a fair amount (I show 9.36 dBi gain). I didn't run circular,
and doubt that it has much in the way of circularity, which is kind of
obvious from the elements. Even though they are skewed in a way which
he probably patented.

tom
K0TAR