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Re: VHF Spherical Antenna Designer wanted!



What's the capacity of the 8Kg monster battery?

Pieter

----- Original Message -----
From: "Bob Bruninga" <bruninga@usna.edu>
To: <amsat-bb@amsat.org>
Cc: "TAPR APRS SIG" <aprssig@lists.tapr.org>
Sent: Thursday, September 19, 2002 5:03 PM
Subject: [amsat-bb] VHF Spherical Antenna Designer wanted!


> Antenna designer needed:
>
> We have a funded Launch opportunity for the next PCsat in less than a year
> and need a good RF designer and antenna modeler to help out.
>
> The free ride is because we can go inside of a perfectly spherical but
> totally passive mirror surfaced 18" diameter ball.  The antenna must be
> totally internal and have absoultely zero externals.  Last year we built a
> "split-sphere" model and EZNEC and our full size model showed that with a
> 1" insulated gap between the upper and lower hemispheres we can get the
> thing pretty close to a good match for 145.825 MHz with the whole thing
> pretty much acting like a dipole.
>
> But with 3 other satellites under design and construction, and me being
> the only HAM/Comm guy, I just dont have time to do all that I want to to
> make sure this split-sphere design will tune up.
>
> Design to date:    http://www.ew.usna.edu/~bruninga/ande.html
>
> The PCsat style digipeater will run for 2 years with 8Kg of Lithium
> primary cells (no external solar power possible)...
>
> What I need is someone (who really knows what he is doing) that is willing
> to give their "life" to this antenna design over the next 9 months... for
> the sake of getting another UI packet digipeater into space...
>
> Just thought I'd ask...
>
> de WB4APR, Bob
>
>
>
>
>
> ----
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