Hi Ian, Francois
Ian, firstly I think this is regarding the 1090Mhz (receive), so gain is not an issue.
Francois, yes you could use this, the question I would ask you is 'why do you want to do this ?'
If you are concerned about the performance, this will not be an issue.
Using the standard 1090Mhz tuned antenna, I receive signals from 200km easily
As this product is intended for localised traffic avoidance, 200km is interesting, but utterly useless
thx
Lee