>Ron
>You can find some application notes
>on controlled impedance at www.polar.co.uk.
>these will give you some basic grounding on
>RF pcb structures...
>There is also an evaluation version of  a field
>solving calculator for download. I hope you
>find it useful.
>Kind regards
>Martyn Gaudion
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http://www.eagleware.com seems to have some fairly
potentn looking RF simulation/design software for sale.