We have shown experimentally, in a real-world setting, that it is possible to use two beams of incoherent radio waves, transmitted on the same frequency but encoded in two different orbital angular momentum states, to simultaneously transmit two independent radio channels. This novel radio technique allows the implementation of, in principle, an infinite number of channels in a given, fixed bandwidth, even without using polarization, multiport or dense coding techniques. This paves the way for innovative techniques in radio science and entirely new paradigms in radio communication protocols that might offer a solution to the problem of radio-band congestion.
New Journal of Physics
- Pub Date:
- March 2012
- Physics - Instrumentation and Detectors;
- Astrophysics - Instrumentation and Methods for Astrophysics;
- Physics - Classical Physics
- 17 pages, 6 figures, with a public experiment, three audio files in mp3 format