Helical Beam is great at 400 MHz, could be too big for 137. Nasa, mil have
them. About 1 wavelength in circumference, 2.5 foot diameter, 5-6 turns,
circular polarization, and can be pointed at satellite. Circular pol needed
usually as most satellites tumble.

other signals out there at:
http://nssdc.gsfc.nasa.gov/spacewarn...diobeacon.html


"Jerry Martes" wrote in message
...
I'd like to build an antenna for receiving 137 MHz signals from polar
orbiting NOAA weather satellites. I would like to get some information
from
any of the readers of this group who might have thought about designing an
antenna for this application.

Jerry