The actual energy in the RF is basically nothing. The sun has been outputing RF since the beginning of existence I’m pretty sure something would have evolved to make use of it if it had any sufficient energy density.
But if you think about it your phone is generating an RF field off the back of a tiny lithium ion battery, almost all of that power is going to power the screen anyway, the dribble of power that so left over is transmitted and then spread out over 50 kilometers of area. Anyone location is receiving less power than it would if it just absorbed power from sound waves
The actual energy in the RF is basically nothing. The sun has been outputing RF since the beginning of existence I’m pretty sure something would have evolved to make use of it if it had any sufficient energy density.
But if you think about it your phone is generating an RF field off the back of a tiny lithium ion battery, almost all of that power is going to power the screen anyway, the dribble of power that so left over is transmitted and then spread out over 50 kilometers of area. Anyone location is receiving less power than it would if it just absorbed power from sound waves