[Wswss] Re: Request for conceptual design info--cooperative microwave effort CC-Rider

[Cliff Buttschardt]

Cliff Buttschardt wrote:
> This month many highly useful microwave, communications conferences
> are in progress.  I would like to bring to your attention a long term
> microwave satellite experiment that has been around since 2003.  This
> should interest the groups mentioned above and a few others as well!
>      Many hands make easier work so it would seem that the first step
> would be to segregate a number of small blocks composing the overall
> design.  First, the eventual goal should be mentioned.  The name of
> this 5.7 GHz project is "The CC-Rider" proposed for use on AMSAT's
> EAGLE satellite but equally useful for point to point communications
> due to the simplicity generated by the drift cancellation ability
> built into the system.  Here is the conceptual URL:
> 
> http://www.amsat.org/amsat-new/eagle/documents/cc-revisited_paper.pdf
> 
> If we were to allocate individual tasks, they might be these:
> 1)  5750 MHz local oscillator, 10 mW out with reasonable stability
> 2)  5670 MHz low noise preamp
> 3)  5800 MHz power amplifier with one half to one watt output
> 4)  low noise receiving mixer
> 5)  low IMD transmitting mixer
> 6)  antenna assemblies, steerable or non steerable such as a patch
> 7)  AFC system using a continuous received tone into a standard IF
> As always there are integration tasks that hams do well developing.
> 
> Let's conclude by asking that we start thinking about simple ways of
> first assembling such a system using available off the shelf components.
> This might be OEM units connected with SMA connectors for both transmit
> and receive.  Later, a PC board design similar to the "no tune" of past
> years in which the LO, mixers and filters might be placed.  The first
> step is to find simple brassboard assembly suggestions.  This note is
> just that first step.      Cliff K7RR  CUBESAT San Luis Obispo, CA.
> 
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