> -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] On Behalf Of Dan McMahill > Sent: 05 January 2006 22:07 > To: [email protected] > 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.
