... like to play in the >10GHz regions.

In the UK, we are licensed to use the following:

10GHz:

10,000 to 10,500 MHz

24GHz:

24,000 to 24,250 MHz

47GHz:

47,000 to 47,200 MHz

76GHz:

75,500 to 81,000 MHz

The following bands are also allocated to the amateur service and the amateur satellite service:

122,250-123,000 MHz

134,000-136,000 MHz

136,000-141,000MHz

142,000-144,000 MHz

241,000-248,000 MHz

248,000-250,000 MHz

I'm not entirely sure what goes on at these lofty heights (my amateur radio use stops at 440MHz at the moment), but I bet it'd be pretty cool to make a contact on 250GHz!

Cheers

Josh

I still remember playing with the "3 cm wave" box in Nuffield Physics. Maybe modulating it is the difficult part?

I believe the Amsat-DL P5A Mars mission will be using 10.5GHz. Also the long-delayed P3E satellite definately has an X-Band (10GHz) downlink, and I believe it has an X-Band beacon too.

Having said that, I have nothing (yet) to receive on 10GHz.

Regards,

Paul

~~~~~

As this web page convincingly points out, it's very limiting at these higher frequencies:

http://www.arrl.org/news/stories/2001/08/20/1/?nc=1

I mean, earth-moon-earth using the moon as a passive reflector - how pathetic! No wonder they stuck to such a low frequency as 24GHz.

Yeh, but at those frequencies the range isn't likely to be long enough for your left hand to tell your right hand what it's doing.

So, perfect for Ofcom then ...

Loads goes on, read here: http://www.microwavers.org/

As for offcom...least said.

My Tin-foil hat don't work at those frequencies...

time to buy that bunker or move to somewhere where they won't waste money on such crap.

Hmmm looks like im off to Russia, well... Georgia is buggered up, Ukraine is about to be nuked. I can't even go to the north or south poles, as they are about to melt(if they havnt already, and the yanks have suppressed the data)

:(

At these nosebleed high frequencies, it's getting increasingly difficult to tell the difference between millimeter waves and long wave infrared. Anything above a few dozen GHz is getting into the realm where the atmosphere absorbs a lot due to the elements such as water and gas. So what's the point of trying to transmit up there? I dunno...

Get on a couple of towers and you have a 20km link at 100Mbits if you can afford the gear.

"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

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.