It is feasible in case you have a wave-guide system where propagation is dependent on tunable configuration. Accordingly, you can modulate your metamaterial medium where you are in charge of magnitude in terms of electrical or electric counterpart.
After modulating the signal to be launched to another point by guided or unguided communication systems (Free-to-air, FTA), It is better to have a wave guide to preserve the signal undistorted with less losses, dispersions, noise, .....