Researchers at the University of Southern California, building on its previous work on infinity-capacity twisted laser vortex networks, has now adapted its technology to work with boring ol’ radio waves. The previous laser-based technique was only workable over short distances, with minimal atmospheric interference. Twisted radio waves are more rugged and can be reliably transmitted over much larger distances, potentially allowing for wireless networks that can carry much more data than your existing WiFi router — perhaps into the hundreds- or thousands-of-gigabits-per second range. Two and a half years ago, we wrote about a Swedish researcher who — after many years of work — finally proved that you could transmit radio waves in three dimensions, rather than two. Every wireless network that you’ve ever used — from WiFi to 3G to satellite TV — uses radio waves that oscillate (go up and down) in just two dimensions. Bo Thide found that, by simply twisting the antenna, you could impart some kind of corkscrew action to the radio waves so that they also travel width-ways, in a third dimension. In theory, hundreds — or perhaps thousands or millions — of wireless connections could share the same carrier frequency if they all had a slightly different level of twist. via ExtremeTech.
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- Tags: antennas, Category_News>Pushing the Envelope, Category_News>Tech Lab, MITD, radio, wifi