[amsat-bb] Re: 71GHz

John g3bvu at arrl.net
Wed Nov 8 05:32:18 PST 2006

At 10:58 11/8/06 -0000, you wrote:
>Ofcom has today published provisions for opening the 71-76GHz and 81-86GHz
>bands for licensed use which will increase the opportunities for broadband
>fixed wireless services.  
>Further details can be found at: 
>"Ofcom will permit the operation of the Amateur and Amateur Satellite
>allocations on a primary basis within the upper guard band of the 71-76 GHz
>block i.e. 75.875-76 GHz band. Amateur and Amateur Satellite use between
>75.5 - 75.875 GHz will be permitted on a secondary basis."
								8 November 2006
		A very interesting document particularly with the proposed PRIMARY
Amateur allocation 75.875-76.000 GHz.

	To put the overall (radiated) power limit in perpective, it is 1 watt
maximum into a well illuminated , very SMOOTH, nominal 3ft dish; a
beamwidth of about 0.3 degree. 

	Starting with an X-band source, a varactor doubler followed by a varactor
tripler should do the job. 

	(Remember when we used varactor multipliers for the 70cm and 23cm bands?)

	John   G3BVU      SK


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