[amsat-bb] Re: S band and Eagle: an appeal for a higher leveldiscussion

Trevor m5aka at yahoo.co.uk
Fri Sep 8 04:55:32 PDT 2006

--- kc6uqh <kc6uqh at cox.net> wrote:
> The 10 GHz band is the only band that does not provide for part 15 ISM 
> equipment.

True but bear in mind that in some contries only 10.450 - 10.460 GHz is
available for Amateur Satellite use.

> 2.4 and 5.8 are good places to transmit. 

Except that in a number of countries Amateurs have been banned from
transmitting in 2.40 - 2.45 GHz in order to protect the myriad of unlicenced
consumer devices operating in that band. 2.40 - 2.45 GHz is a bad place for an

At the present time a transponder downlink operating near the bottom edge of
the Satellite allocation, somewhere between 2.400 and 2.401, is viable. The big
question is what will it be like during the operational lifetime of the two
Eagles from 2011 to 2026 ? 

More and more consumer devices are having WiFi/Bluetooth added to them. It is
not unrealistic to expect that by 2012 most households will have 3 or 4
seperate 2.4 GHz devices running continuously. In urban areas this would create
significant problems for satellite operation.

Long term we need additional S-Band spectrum for the Amateur Satellite Service,
say 2.390 - 2.400 GHz and/or 2.300 - 2.310 GHz although the latter allocation
may be problematic with some countries.

We can only get additional Satellite allocations through the ITU. Is the ARRL
considering putting forward any proposals regarding this ? 

New allocations would of course take several years to acheive.

73 Trevor M5AKA

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