[SI-LIST] Re: Causality
- From: "Jim Nadolny" <jim.nadolny@xxxxxxxxxx>
- To: "Jennifer Maharani" <jennifer.maharani@xxxxxxxxx>, <si-list@xxxxxxxxxxxxx>
- Date: Thu, 14 May 2009 16:14:52 -0400
Greetings Jennifer,
I do not know of an elegant method. For simple structures, you might be
better off constructing an R, L, C, TL model that more or less matches
your S-parameters. Again - if it is a simple structure this process can
be pretty quick. Once you get to several coupled elements or
electrically rich structures - well then it gets too messy.
Good Luck -
Jim Nadolny
-----Original Message-----
From: si-list-bounce@xxxxxxxxxxxxx [mailto:si-list-bounce@xxxxxxxxxxxxx]
On Behalf Of Jennifer Maharani
Sent: Thursday, May 14, 2009 3:49 PM
To: si-list@xxxxxxxxxxxxx
Subject: [SI-LIST] Causality
Dear all,
I have non-passive non-causal S-parameter. I can use some commercial
tools that can generate broadband spice with passivity enforcement.
Not with causality enforcement, though.
In transient simulation it clearly shows non-causal response.
Does anybody know how to resolve this issue? Quick and dirty solution
will also be appreciated.
Many thanks.
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