--- On Sat, 8/6/13, avignonmimi@... <avignonmimi@...> wrote:

It would be nice if someone made a circular polarized antenna with
a left or a right pattern, so they could be used terrestrially.

The only problem might be whether to use Left or Right circular as there's 30 dB's attenuation between the two.

The IARU recommends using Right-hand Circular, see 8.8.7 of the VHF Handboook at
http://www.iaru-r1.org/index.php?option=com_remository&Itemid=173&func=fileinfo&id=178

Circular antennas are available from Wimo
http://www.wimo.de/helix-antennas_e.html

73 Trevor M5AKA