Twisted radio waves could free up more bandwidth for mobile phones and computers.Marcus Mok/CorbisBandwidth available to mobile phones, digital television and other communication technologies could be expanded enormously by exploiting the twistedness as well as wavelength of radio waves.
That is the claim being made by a group of scientists in Italy and Sweden, who have shown how a radio beam can be twisted, and the resulting vortex detected with distant antennas.
http://www.nature.com/news/2011/110222/full/news.2011.114.html?s=news_rss
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