I am supposed to be familiar with (or subject matter expert) on antennas...but no idea about drone...so just talking with my big mouth...lol
Due to the nature of its application, it appears the type of antenna on the drone has to be omni-directional.
Then I could see 2.4GHz link (5 Ghz is better) could become very hard to maintain connectivity over even a few hundred yards as the omni-directional antenna picks up all the possible interference from countless terrestrial wifi devices... But in the middle ocean, there is no interference so it appears it can go pretty far...But still not as far as 3 - 4 miles...but water reflection will be problem...creating multi path problem...maybe new LTE (MIMO) may be able to handle it better...
US Navy uses USV (unmanned surface vehicle) with 2.4GHz and it goes pretty far... And if they need to extend the communication range beyond whatever their limit, they can remotely control USV to launch mini-aerostat with 2.4 GHz radio up to 500ft air... then it can go really far and clean up the enemies... bla bla bla
Kingofthesea wrote:You're thinking of the kind of drone the Army uses to kill the camel turds over in Iraq. Can't buy or afford those birds but they are the cat's ass huh?
But technology is changing ...Google (oneweb owned by google) is launching micro-satellites only 1200 km above (they already got FCC and ITU-R appoval)... Interestingly, they are building their manufacturer (
http://oneweb.world/) around Port Canaveral, FL... It won't be too far that we will have several thousand micro satellites all over the sky...
Drone can be equipped to communicate with micro-satellites at substantially cheaper cost, then your limitation is battery life not communication range...technically you can control the drone on the other side of the earth...lol
KOTS
How is your new drone business? How many dropped on ocean floor?