[amsat-bb] Re: A0 40 replacement

Gus 8p6sm at anjo.com
Wed Sep 4 10:43:53 PDT 2013


However, to include operators with modest shacks, you need to allow 
operation on modes A, B and/or J.  A satellite operating on 24.0 GHz 
won't be of interest to the average ham.  Not until the average ham has 
24.0 GHz capable antennas, feedlines, amplifiers, transceivers, etc, in 
his shack.

It's a vicious circle.  Smaller satellites are easier to launch, but 
support smaller antennas.  This means higher frequencies, which excludes 
more potential users.  Reduction in potential user-base leads to reduced 
support (financial) from said user-base.  With less money to spend, it 
becomes more difficult to obtain a launch, and to build the highly 
miniaturized spacecraft in the first place.....

On 09/04/2013 11:31 AM, Bryce Salmi wrote:
> Yea but increasing frequency helps with that. With directional 
> antennas the satellite would need attitude control which would benefit 
> greatly from miniaturization. For the most part, miniaturization would 
> come from incorporating systems on chips. Most op amps and 
> microcontrollers are much smaller than their packages so including 
> those systems on a single die in a single package are capable of 
> massive savings in space. This is what made smart phones even possible .
> Gus <8p6sm at anjo.com> wrote:
>     On 09/04/2013 02:26 AM, Brenton Salmi wrote:
>         Let's put it in another possible context: Create an extremely
>         dense and reliable LEO platform in cube-sat form that weigh's
>         a fraction of AO-40's weight using today's high-density
>         components/systems and create a reliable and feature rich HEO
>         cubesat.
>     The only problem with this, is that certain components can't be
>     miniaturized.  Example: Antennas.  And HEO satellites need more
>     sophisticated antennas.
>     Pity the cube-sat idea didn't finish up with a ten INCH cube...
>     --
>     73, de Gus 8P6SM
>     Barbados, the easternmost isle.
>     ------------------------------------------------------------------------
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> Sent from my Android phone with K-9 Mail. Please excuse my brevity. 

73, de Gus 8P6SM
Barbados, the easternmost isle.

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