RE: [SI-LIST] : More Help

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From: Shawn Carpenter ([email protected])
Date: Thu Sep 07 2000 - 13:20:46 PDT


We do a lot of work looking for these cases, and have published some for
planar EM solvers. Some examples that work quite well for this are a
zero-thickness stripline, and a coupled zero-thickness stripline, for which
theoretically exact closed-form solutions exist.

We have an Excel spreadsheet that will compute the exact closed-form values
for Zo, coupling, Z-parameters and S-parameters at any frequency for a
user-defined stripline/material geometry (flat conductors, lossless
materials). You can reach this at:

We have a benchmarking document on our web site that may help, starting at:

There are a couple of things with exact solutions, and a number of "common
sense" tests as well--all relating to planar EM (2.5D) simulation.


-----Original Message-----
From: [email protected]
[mailto:[email protected]]On Behalf Of Michael Lamson
Sent: Wednesday, September 06, 2000 10:47 AM
To: [email protected]
Subject: [SI-LIST] : More Help

Hi folks! Thanks to all those responding to my question on board
geometries. It worked so well I now have another question to present.

I'm looking for 2D and 3D electrical modeling cases that can serve as
standards. That is, they have a closed form solution, or solvable through
conformal mapping, or have been solved by so many experts that the solution
can serve as a standard. The cases I am aware of are for two round wires, a
round wire above a plane, and round coaxial conductors for 2D. I'm not
aware of anything for 3D (looking for plane and trace inductance with two
ports or more).

Again, any help is appreciated.

Best regards,

Mike Lamson
[email protected]

|| Shawn Carpenter
|| Sonnet Software, Inc. "High-Frequency Electromagnetic Software"
|| N2JET
|| EMAIL: [email protected]
|| Phn: 315.453.3096 Fax: 315.451.1694
|| Toll-Free: (877) 776-6638 (877-7SONNET)

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