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RE: gEDA-user: trace calculation

> -----Original Message-----
> From: owner-geda-user@xxxxxxxx 
> [mailto:owner-geda-user@xxxxxxxx] On Behalf Of Dan McMahill
> Sent: 05 January 2006 22:07
> To: geda-user@xxxxxxxx
> Subject: Re: gEDA-user: trace calculation
> 
> Robert Thorpe wrote:
> > Microvias in particular are thin and have significant inductive 
> > reactance at high frequencies.  Normal vias are not so bad.
> 
> you can minimize the effect of a via by nominally matching it 
> to the trace.  In other words by varying the via diameter you 
> have a handle on its impedance and there usually is an 
> optimum value.  Brian Wadell's book gives some details on this.
 
Yes, or by using more than one via.