Great! It sounds like you have it well planned. I was afraid you were
one of those fellows who thought it is a trivial problem.

I have a little experience(old) in ATV on 439 and current experience
in RC.
You have probably already planned for these things but let me share
observations:

All antennas with gain have reduced bandwidth.. a TV signal without
sound requires at least 4mhz without degradation.

All antennas with gain have reduced beam width. A little yaw with
anything resembling a yagi is going to be very noticeable.

It is easier to get gain at the receiving end than the transmitting
end. My 48 element collinear was very wide band and measured 21 db
gain. It is 3X5 feet.

Good luck, John Ferrell W8CCW

PS, AMA insurance specially excludes autonomous flight.


On Sat, 03 Dec 2005 11:00:06 -0600, Chris W wrote:

John Ferrell wrote:

A simple dipole will do what you want. That is a lot of power in the
John Ferrell W8CCW