Previously linked question (which is closed but already has answers).
Say we have a type of implanted device in human body (say, ear) used to communicate over a distance. I am thinking about a combination of super-capacitor charged over human body to make this device self-powered.
But transmission over a long distance certainly requires a nontrivial amount of power, and being an implanted device makes this trickier. Currently there are nanoradios and this kind of design but the transmission range are not enough for long-range (say, over 100m or even over 1 mile) communications.
So my question is, can a miniature implanted device in human body transmit information over a long distance, say 100m or 1 mile (or even longer)? What factors would be important and how?
I want the design to be scientific and based on current technology as much as possible.