Radio pasta
Stories from Physics
for 11-14
14-16
A team of Italian and Swedish researchers have found a way to develop fusillishaped radio beams, with a view to reducing radio wave congestion. The popularity of mobile phones means that the number of radio frequency bands available is decreasing. By twisting radio waves clockwise or anti-clockwise about their axis, the researchers found that multiple signals could be transmitted on the same frequency channel without interference.
References
F. Tamburini, E. Mari, A. Sponselli, B. Thidé, A. Bianchini, F. Romanato. Encoding many channels on the same frequency through radio vorticity: first experimental test. New Journal of Physics, 2012, vol. 14, no. 3, 033001
