Hi Group

Can anyone give me a brief explanation of the theory of operation of a
commerical FM broadcast antenna. Specfically the Jampro JMPC (picture
at )http://www.jampro.com/fma/jampjmpc.htm It looks to me like a couple of
1/2 wave dipoles each folded into V and fed in phase using two gamma
matches. If this is true I am puzzled by the tap point chosen. It seems
further along the dipole than I am used to seeing, even considering that the
feed for the dipole is likely 100 ohm. The feed must be very inductive.
Polarization is stated as RH circular. How is this controlled?
WB6KCN
Eric