Ron - One step better, there are impedance calculators available (Polar comes to mind) which easily calculate Zo and C (from which you can derive L). I don't have the web site, but a quick search via an engine can get you there quickly.
Regards, Mark Gill, P.E. EMC/Safety/NEBS Design C-MAC Engineering Design Services RTP, NC, USA (P) 919-991-7513 > -----Original Message----- > From: Ron Pickard [SMTP:[email protected]] > Sent: Wednesday, September 06, 2000 6:58 PM > To: [email protected] > Subject: Embedded Microstrip Co Query > > > Hello to all in the group, > > I have a little problem. Yeah, I know, but I'm only admitting this one. ; > -) > > So, here's my dilemma. The problem I 've run into is that equations for > distributed capacitance for an microstrip transmission line (plain and > embedded) in a PWB found in a couple of references are such that they > provide significantly different results. One reference even provides for a > mathematical impossibility as a result, however, I am sure that this was a > misprint. > > I do not have access to the applicable IPC spec, so I do not have access > to > these equations for distributed capacitance for a microstrip transmission > line (plain and embedded) in a PWB. If anyone in the group knows the > formula from the IPC spec or can look it up for me and send it my way, I > would certainly be very grateful. > > Thank you in advance and I am eagerly awaiting your replies. > > Best regards, > > Ron Pickard > [email protected] > > PS - I hope that this does not infringe on any IPC copyright. > > > > ------------------------------------------- > This message is from the IEEE EMC Society Product Safety > Technical Committee emc-pstc discussion list. > > To cancel your subscription, send mail to: > [email protected] > with the single line: > unsubscribe emc-pstc > > For help, send mail to the list administrators: > Jim Bacher: [email protected] > Michael Garretson: [email protected] > > For policy questions, send mail to: > Richard Nute: [email protected] > >
