I have started a company that is developing micro-UAVs for military, law
enforcement and civilian use. They are multi-copters (Quad and Hex).
I am using both 900 MHz and 1.2 GHz transmitters for both telemetry and live
video links. The 1.2 GHz has been tested for several miles which is about
as far as the UAVs will be flying. Generally they are limited to 400 feet
or so.
Where are you located and what type of aircraft are you flying?
Regards,
Allen