RE: [SI-LIST] : Attenuation on a PCB trace

About this list Date view Thread view Subject view Author view

From: Ray Anderson ([email protected])
Date: Mon Apr 23 2001 - 14:48:15 PDT


Yes, our group has modeled the rise time degradation in simulation using the
Hspice W-element and have achieved reasonable model to hardware correlation.

When using a microstrip model, the fields propagated through the dielectric
and through the air are accounted for in the model, so I don't think you
really want/need to kluge up a model that utilizes a stripline and an
airline to do the simulation.

Sun Microsystems Inc.

>I interested in whether on not anyone has modeled this degradation of rise
>time (see excerpt below) that Mike has mentioned using a simulator. Can it
>be done by building two transmission lines in the simulator, one for air
>dielectric and one for FR4? If the two parallel transmission line method
>works how would one calculated how much impedence to allocate to each
>dielectric? Will a field solver tell you this?
>Dave Lorang

**** 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

About this list Date view Thread view Subject view Author view

This archive was generated by hypermail 2b29 : Thu Jun 21 2001 - 10:11:41 PDT