[SI-LIST] : Via model

About this list Date view Thread view Subject view Author view

From: Cosmin Iorga ([email protected])
Date: Thu Aug 03 2000 - 10:02:20 PDT

Does anybody know a field solver that can extract and simulate
a via model from a board database? The via model should include
both signal and return path if the transmission line changes the
reference plane. The following picture tries to illustrate it:

|______________________________| <-- trace 1 (top layer)
 ___________________________ || __________________________________
|___________________________ || ________________ground plane 1____|
                             || ||
              signal via --> || || <-- ground via (return path)
                             || ||
 ___________________________ || ___||_____________________________
|___________________________ || ________________ground plane 2____|
 trace 2 (bottom layer)--> |___________________________________|
 The signal propagates through trace 1, which is a microstrip
 line referenced to ground plane 1, then through the via and
 trace 2, which is a microstrip line referenced to ground plane 2.
 The return path for the current consists of ground plane 2,
 ground via, and ground plane 1. The transition from the top
 to the bottom layer will look more inductive if the distance
 between the signal and ground vias increases. So far I've tried
 XTK and SPECCTRAQuest but none of them could extract correctly
 this via model.
 Best Regards,
 Cosmin Iorga
 (818) 874-7149

**** To unsubscribe from si-list or si-list-digest: send e-mail to
[email protected] In the BODY of message put: UNSUBSCRIBE
si-list or UNSUBSCRIBE si-list-digest, for more help, put HELP.
si-list archives are accessible at http://www.qsl.net/wb6tpu

About this list Date view Thread view Subject view Author view

This archive was generated by hypermail 2b29 : Wed Nov 22 2000 - 10:50:57 PST