What type of radio could be used to control a R/C helicopter 1-2 miles away?

How are UAV's controlled all over the world without any signal interference?





Is it just a really powerful transmission output? Or as I assume, probably using a satellite to bounce the signal?





I always thought it would be neat to house a camera and fly my R/C heli from a screen, but you would risk the helicopter losing signal and crashing if it went too far.





Are there types of radio systems for R/C helicopters which could allow them to be controlled up to say 1-2 miles away?What type of radio could be used to control a R/C helicopter 1-2 miles away?
The military control systems use special signal coding and satellite links. I don't think that a standard R/C channel is a good place for long distance operation due to power limits and the issue of interference from other transmitters in the area.


You might want to get a Technician Class Ham license. This will allow you access to a huge spectrum and higher power systems.


This is not an easy project for you to start off with unless you have a pretty solid grasp of electronics.