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Filters could provide new spectrum


Metamaterial clears radiation


A "metamaterial" that filters terahertz radiation could open up new spectrums for wireless communication.


According to New Scientist, The new apparatus, developed by researchers at the University of Utah have worked out a way of using terahertz waves for communications.

The device is a sheet of metal foil using a carefully designed pattern of holes that interacts with electromagnetic waves in novel ways, thanks to

sub-wavelength structural features.

The filter is a first step towards developing a terahertz communications system. If the system is developed it will only work over relatively short distances, like a computer network, as the waves are absorbed by moisture in the atmosphere over longer distances.

They believe that it will be five years before any complete system can be developed.

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Last modified on 30 March 2007
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