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German Researchers Hit 40 Gbps On Wireless Link

Posted by Unknown on from the don't-stand-in-front-of-it dept.

judgecorp writes "German researchers from the Fraunhover and Karlsruhe institutes have achieved 40Gbps transfers over 1km using a wireless link. The new record raises the hope that point-to-point wireless could be used instead of expensive fibers in some rural broadband applications." Partially thanks to transmitting between 200GHz and 280GHz.

1 of 104 comments (clear)

  1. Not good for long haul use by Muad'Dave · · Score: 5, Interesting

    This band is not useful for long haul carriage due to atmospheric water vapor absorption. According to this chart, absorption between 200 and 280 GHz varies between 3 and 40 dB/km. That means at the low end only 50% of your signal is absorbed every km. At the high end, only 1/10,000th of your signal remains after each km.

    this post speaks to similar issues including refraction.

    --
    Tiller's Rule: Never use a word in written form that you've only heard and never read. You will end up looking foolish.