[Ground-station] Ground-Station Digest, Vol 19, Issue 18

[Michelle Thompson]

What's the minimum power we need for a 10 GHz beacon?

-Michelle W5NYV




On Mon, Oct 28, 2019 at 2:59 PM Thomas Parry via Ground-Station
<ground-station at lists.openresearch.institute> wrote:

> Hey,
>
> I've had a quick look at this and by my calculations you're only going to
> get 0.5 W from the solar cell at boresight. Adding the lack of maximum
> power point tracking I reckon you can only count on >250 mW for the design.
>
> I think this really precludes anything at 10 GHz. Anything that low power
> and low footprint will be custom silicon (or III-V). Although I would
> welcome being proved wrong.
>
> I'm my opinion that really pushes you into the sub-GHz option. Which
> raises the question of antennas, anything VHF will be very inefficient.
> Ideally a high UHF frequency?
>
> Will keep mulling it over and will have a deeper look into components.
>
> Thomas
>
> On Mon, 28 Oct 2019, 16:55 ,
> <ground-station-request at lists.openresearch.institute> wrote:
>
>> Send Ground-Station mailing list submissions to
>>         ground-station at lists.openresearch.institute
>>
>> To subscribe or unsubscribe via the World Wide Web, visit
>>
>> http://lists.openresearch.institute/mailman/listinfo/ground-station
>> or, via email, send a message with subject or body 'help' to
>>         ground-station-request at lists.openresearch.institute
>>
>> You can reach the person managing the list at
>>         ground-station-owner at lists.openresearch.institute
>>
>> When replying, please edit your Subject line so it is more specific
>> than "Re: Contents of Ground-Station digest..."
>>
>>
>> Today's Topics:
>>
>>    1. draft Custom Sensors Inspired by AmbaSat (Michelle Thompson)
>>
>>
>> ----------------------------------------------------------------------
>>
>> Message: 1
>> Date: Mon, 28 Oct 2019 08:52:26 -0700
>> From: Michelle Thompson <mountain.michelle at gmail.com>
>> To: Michelle Thompson via Ground-Station
>>         <ground-station at lists.openresearch.institute>
>> Subject: [Ground-station] draft Custom Sensors Inspired by AmbaSat
>> Message-ID:
>>         <
>> CACvjz2XT19R27vXZHeuXuFpTS10-ZR7Cc5s3pPXMMp4xbBFnZw at mail.gmail.com>
>> Content-Type: text/plain; charset="utf-8"
>>
>> Here's a draft of the custom sensor document. These are ideas inspired by
>> the AmbaSat project.
>>
>> Summary: beacons beacons beacons!
>>
>> I found *several* other AmbaSat people at AMSAT Symposium. Most of us have
>> asked for specifications for the custom sensors and also for the custom
>> board. Those specifications are still missing from this document, but I'll
>> put them in when I get them.
>>
>> I've stepped up the Number of Asking Gently request level I am giving
>> AmbaSat.
>>
>> If we can fill out the designs a bit then I can find funding to make
>> prototypes. You never know who might fly something like a 10 GHz beacon if
>> there's an easy-to-incorporate board.
>>
>> Take 15 minutes today and suggest some parts, additional sensor ideas, or
>> provide feedback.
>>
>> -Michelle W5NYV
>> -------------- next part --------------
>> An HTML attachment was scrubbed...
>> URL: <
>> http://lists.openresearch.institute/pipermail/ground-station/attachments/20191028/bdaee73b/attachment.htm
>> >
>> -------------- next part --------------
>> A non-text attachment was scrubbed...
>> Name: Ambasat-Inspired-Custom-Sensors.pdf
>> Type: application/pdf
>> Size: 342540 bytes
>> Desc: not available
>> URL: <
>> http://lists.openresearch.institute/pipermail/ground-station/attachments/20191028/bdaee73b/attachment.pdf
>> >
>>
>> ------------------------------
>>
>> Subject: Digest Footer
>>
>> _______________________________________________
>> Ground-Station mailing list
>> Ground-Station at lists.openresearch.institute
>> http://lists.openresearch.institute/mailman/listinfo/ground-station
>>
>>
>> ------------------------------
>>
>> End of Ground-Station Digest, Vol 19, Issue 18
>> **********************************************
>>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.openresearch.institute/pipermail/ground-station-openresearch.institute/attachments/20191028/6f09c14b/attachment.html>