Ofcom steps up the power for unlicensed broadcasting
But only for those topping 10GHz
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UK regulator Ofcom has published a consultation on increasing the limits on broadcasting above 10GHz, claiming that at such high frequencies the range is so small it's not going to bother anyone anyway.
Currently the caps on licence-exempt usage only go up to 10.6GHz, and generally increase with the frequency. The new proposal from Ofcom continues this, pointing out that as the frequency rises the range drops, so the potential for interference decreases and the transmission power can safely be increased.
This is like marking out building zones in Death Valley on the basis that someone might want to live there one day; but then without similar foresight New York wouldn't have Central Park, so sometimes it pays to think ahead.
The only people likely to be interested in such high frequencies for the foreseeable future are the Ultra Wideband (UWB) crowd, as they've no interested in penetrating walls or being able to transmit more than a few meters. But even UWB is struggling to get above 6GHz, as required by the Bluetooth variant, so there's no immediate urgency in Ofcom's regulation.
The only people hanging around at such high frequencies these days are radio telescopes and satellite communications, so an UWB-enabled set-top box operating at this level could in theory impact your Sky reception. But the chances of the UWB signal getting through the walls of a house to where the Sky dish is located are pretty small, so it shouldn't be an issue.
Those who think it might, or other interested parties, are invited to comment before the end of October. ®
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COMMENTS
Amateur TV
I did a lot of work about 10 years ago running 10GHz Tv and data, its relatively simple. As for range there are a lot of odd propogation effects that take place so weird results sometimes happen. Its certainly possible to do 300 plus miles on 10 watts or so. These days its even easier to generate higher power signals too.
Loads going-on, commercially.
"Wireless transmissions with speeds exceeding 10Gb/s are practical using millimeter-band (30-300GHz) frequencies, which are seldom used commercially and where wide swaths of bandwidth can be readily secured. Within that band, the ‘radio window’ of 70-100GHz is attractive because signals are relatively unaffected by passage through the atmosphere, allowing them to travel several kilometers or more"
http://www.semiconductor-today.com/news_items/2008/JUNE/FUJITSU_200608.htm
Loads going-on in amateur radio circles as well, using surplus commercial gear as well as home constructed gear.
Try this list of amateur 10ghz tv repeaters Paul...
http://www.superiorsignals.co.uk/superior/hamatv.htm
WISP people like the high end
Get on a couple of towers and you have a 20km link at 100Mbits if you can afford the gear.
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