xG Technology is making waves with their novel xMax wireless broadband technology.
xMax uses existing TV or pager frequencies and transmits data signals with extreme low power. This way the signal is not interfering with the other signals. It can only be received or heard with special antennas. The big thing is that xMax can reuse the already sparse radio spectrums, enabling a low cost infrastructure.
More details in this Reuters story and on the XG Technology site.
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