Hi Cecil

I'll top post to your question and the other repliers.

I have *NO* thoughts of money transfer. This is not an invention. I
merely assembled a set of four dipoles so they'd produce a pattern thats
sensitive to RHCP thruout the entire hemisphere. I'd probably even pay to
get someone to try building and testing one of these Cross antennas. I just
dont know what it is good for except receiving signals from NOAA weather
satellites.

The Double Cross does look alot like a Lindenblad. But, the dipoles are
tilted more sharply toward vertical.

Cecil, you ask about how this antenna differs from a turnstile. The four
dipole Double Cross has a pattern that has a much greater sensitivity to
RHCP toward the horizon than the turnstile. it even has sensivity to RHCP
at the horizon whereas the Turnstile is linear.

The fundamental concept (Cross concept) is two dipoles crossed at 90
degrees, both tilted from vertical, spaced about 90 degrees and fed in
phase. That produces circular polarization toward the horizon in two
opposite directions.
The Double Cross, which looks a little like the Lindenblad, is two Cross
antennas mounted together. One Cross is fed 90 degrees later than the
other.

I have been trying to develop this concept for more than a year and have
stumbled on a configuration that really works for receiving NOAA polar
orbiting satellite signals.
The GEO community has rejected the double Cross as its being "not
perfect". I dont know anyone else who'd have interest in an antenna thats
really easy to make and will work even when built somewhat differently from
some exact model.

A guy in England has been publishing all the NOAA satellite images I
record here in Los Alamitos. The images can be seen at
http://www.sattraxuk.com/imagestothe...ily/index.html

The images on this site begin and end at zero degree elevation of the
satellite, independent of the received signal strength. So, the viewer can
be assured that the images from this Double Cross are a good indication of
the sensitivity of the antenna and the amount of pattern nilling.

I have some text written to try to describe the concept. It is really
difficult for me to know if that text is understandable. Nobody has ever
asked me to clarify any of it. That is - I get no feedback. I just cant
find anyone interested in my project. Oh, I have located one guy who
thinks the Double Cross has merit. He is Patrik Tast, and lives in Finland.

So, if anyone has interest, or knows of anyone who'd like more info on the
Double Cross concept, I'd sure like to share this with them.

Thanks for the interest
Jerry
KD6JDJ 33.8 N 118.0 W


"Cecil Moore" wrote in message
. com...
Jerry Martes wrote:
I have determined a way to feed four dipoles to provide good horizon to
horizon coverage at all angles for circularly polarized signals.

Hi Jerry, how is your antenna superior to a two-dipole turnstile?
--
73, Cecil http://www.qsl.net/w5dxp