On 1/30/06, David VanHorn <dvanhorn@microbrix.com> wrote:
> >
> > Actually, besides improved performance because you have a good ground
> > system,
>
>
> Until you start working with RF systems, and those stubs start acting like
> resonators on the 3rd and 5th harmonics of the frequencies in use..

David, when you're designing stubs, you're not using coplanar lines
but microstrip. Fortunately up to 5GHz any stub may be replaced with
passive LC using smd's.

cheers,
Vasile


> Or, you blow something simple, like tying the micro's crystal caps to a long
> fat ground track that the micro also ties to somewhere else.  You just made
> a nasty shunt fed antenna.. I've seen this one thing severely flunk a system
> for part 15, and after only modifying this, the same system passed easily.
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