[Community] Case Kit

Denis Shulyaka shulyaka at gmail.com
Thu Jul 19 16:20:15 CEST 2012


2012/7/19 Dr. H. Nikolaus Schaller <hns at goldelico.com>:
> Some of you are not only waiting for a GTA04 board but also for the
> case kit components [1] so that a 3D printed case gives a complete device.
>
> We now have good ideas how to build and connect a new UMTS antenna,
> but it needs experimentation, simulation and measurements until we can
> have it mass produced. Please note that getting an impedance matched
> piece of wire is easy to achieve, but one that really radiates well and
> efficiently isn't. And an inefficient antenna drains the battery faster than
> we want...
>
> But we are still stuck with a new earpiece receiver (the original one
> is no longer produced and not even available from over-stock - except
> one expensive source having access to Asus spare parts). And contacting
> it to the GTA04 board is also very difficult (there are only two small
> copper+gold blobs for miniature springs - too small to add some connector
> and too risky to solder some wires).
>
> And - unfortunately - the replacement GPS antenna we had choosen
> to buy from DigiKey was discontinued by the manufacturer. Most likely
> because the low noise amplifier transistor went out of production.
>
> So as simple as it may look, so difficult it is to synchronize these parts
> and keep the price low. Well, we could now start to design our own GPS
> antenna module, but we know that you already are moaning how expensive
> everything is. Getting something from mass production is always cheaper
> than adapting and customizing components to our needs.
>
> If the mass produced thing fulfills our needs... For GPS would be easy
> if we could get some 15x15mm >20dBm with 50mm U.FL cable from
> a big distributor.
>
> Nikolaus
>
> [1]: http://www.handheld-linux.com/wiki.php?page=GTA04%3ACase%20Kit
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Hi Nikolaus,

We don't have to match the exact dimensions of the original modules
since we are designing the case ourselves. Would it be easier if we
don't limit ourselves to the same dimensions?

Denis



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