Lpc2000

--- In lpc2000@yahoogroups.com, "Guillermo Prandi" 
<yahoo.messenger@...> wrote:
>
> Hi. Sorry for the offtopic, guys. If anybody can point me out some 
good 
> forum/group to post this question, I'll be glad.
> 
> I need to calculate trace witdh and cleareance to achive an impedance 
> of nearly 50 ohm for an RF trace surrounded by a GND polygon. My 
board 
> is SINGLE layered, so I have no power or GND planes. There's plenty 
of 
> online calculators for this *if* I have a GND plane, but I couldn't 
> find any for surface impedance calculation (i.e., between tracks). 
Any 
> hints?
> 
> Guille
>

Oh, never mind. The price difference between single and double layer is 
minimal.

Thanks anyway.

Guille