If you need a 100 meter antenna - could one be approximated using multiple drones in a coordinated 100 meter parabolic trajectory?
The parabolic distribution is not at all needed in this case, you would just adjust the phase at each unit based on the distribution you have.
It is a thing that's considered, mostly for very low frequencies (1-100MHz) where all the above challenges are vastly simplified, and also large antennas (potentially km) are needed for any kind of directionality.
But at lower frequencies, maybe. Or you can do several passes with the same drone and process later :D
Deploying an antenna that's effectively 50 or 100 m wide by lifting 10-20 drones, after some simple ground preparations, could be invaluable in many scenarios, especially for the military, of course.