If you want to go high bandwidth, fiber optics is the way to go. From trans-oceanic cables to the yet-unseen ‘fiber to every home,’ fiber optics allows a lot more bandwidth than a copper cable.

But fiber-optic drones tend to be more expensive and heavier, the Iron Cluster experts said, adding up to 1.5 kilograms [3.3 pounds] extra to the drone's weight for a roughly 10-kilometer [6.2 ...