To make a Transponder antenna, make the radiating rod from an AN-4 bolt,
with the head removed. This bolt will be 2.65 inches from the tip to the
ground plane, and insulated from the ground plane.
Make the ground plane from .062 aluminum, 5.3 inches in diameter.
Attach the center conductor to the radiating rod, and the co-ax ground to
the ground plane.
Sources:
http://rst-engr.com/ - Jim Weir
(RST Engineering)
http://fly.hiwaay.net/~langford/antennas.html - Mark Langford
(On Line Builders Manual)
Regards,
Larry A. Capps
Naperville, IL
-----Original Message-----
I want
antennas
transponder
no idea as
to what size they would have to be.
