Ron: try this link to UltraCad. They have downloadable freeware that does lots of wonderful stripline and microstrip calculations. The help file contains the equations used if you want to get into that.
http://www.ultracad.com/calc.htm > -----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] > ------------------------------------------- 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]
