[SI-LIST] Re: HFSS how to acceleration
- From: "databits" <databits@xxxxxxxxxxxxx>
- To: <scott@xxxxxxxxxxxxx>, <dan.crain@xxxxxxx>
- Date: Thu, 25 Mar 2004 20:05:39 -0600
Extracting RLCG matrices are indeed difficult in HFSS... However,
extraction of a SPICE model is fairly straight forward... I am familiar
with 9.0 and above... The major trick is to make sure that you also
have the "Fullwave SPICE" add-on... Then setup the problem in "driven
terminal" mode. These two items will allow you to extract a wideband
model.... That being said... There is still are more steps to
do...(draw the geometry, assign materials, draw ports, assign
boundaries, select interpolation options, setup frequency range, other)
The good news is that you'll have both SPICE and sparams by the time
that you are done... possibly with frequency dependent loss. The bad
news... Is that there really aren't any matrices...
As Scott said, 2d is a better choice for matrices.
gus
-----Original Message-----
From: si-list-bounce@xxxxxxxxxxxxx [mailto:si-list-bounce@xxxxxxxxxxxxx]
On Behalf Of Scott McMorrow
Sent: Wednesday, March 24, 2004 5:52 PM
To: dan.crain@xxxxxxx
Cc: si-list@xxxxxxxxxxxxx
Subject: [SI-LIST] Re: HFSS how to acceleration
Dan
Unfortunately, you're using the wrong tool for the job. While HFSS is a
wonderful tool for 3D fullwave FEM analysis, it is not exceptionally
adept at the generation of RLGC matrices for uniform trace sections.
The output of HFSS is in s-parameters, which will then need to be fitted
to the equivalent RLGC matrices, which is not a trivial task.
A more appropriate tool for this job depends upon the accuracy that you
require. If you need extremely accurate frequency dependent RLGC table
models, which are valid across a large broadband range, then Ansoft
Maxwell 2D quasi-static FEM field solver is your tool of choice. If you
do not desire high accuracy at high frequencies and across the full
broadband frequency range, then the field solvers inside of Synopsys
HSPICE, Mentor ICX, Mentor Hyperlynx and Cadence SpecctraQuest are
good. Other good medium accuracy solvers like Linpar, which is pretty
darn inexpensive, can be used. And I am sure that others will have
additional choices.
Unfortunately, you are swatting a fly with a nuclear weapon when trying
to use HFSS for this sort of a problem.
regards,
scott
dan.crain@xxxxxxx wrote:
>Esteemed experts,
>I am hoping to simulate and extract RLGC coupling matrices (under even
>and odd mode conditions) for a stripline center conductor that has
>adjacent aggressor conductors on either side (digital interface).
>Fortunately, I have Ansoft HFSS at my disposal for simulating this
>3-line topology. Unfortunately, I am finding the tool ramp to be
>non-trivial and I am under a time crunch which precludes any near term
>training possibility.
>
>I would greatly appreciate any tips from HFSS experts or pointers to
>any web accessible training material that specifically addresses PCB
>geometry simulation and parasitic extraction.
>
>Thanks in advance!
>
>Rgds,
>
>Dan
>
>------------------------------------------------------------------
>To unsubscribe from si-list:
>si-list-request@xxxxxxxxxxxxx with 'unsubscribe' in the Subject field
>
>or to administer your membership from a web page, go to:
>//www.freelists.org/webpage/si-list
>
>For help:
>si-list-request@xxxxxxxxxxxxx with 'help' in the Subject field
>
>List FAQ wiki page is located at:
> http://si-list.org/wiki/wiki.pl
>
>List technical documents are available at:
> http://www.si-list.org
>
>List archives are viewable at:
> //www.freelists.org/archives/si-list
>or at our remote archives:
> http://groups.yahoo.com/group/si-list/messages
>Old (prior to June 6, 2001) list archives are viewable at:
> http://www.qsl.net/wb6tpu
>
>
>
>
--
Scott McMorrow
Teraspeed Consulting Group LLC
2926 SE Yamhill St.
Portland, OR 97214
(503) 239-5536
http://www.teraspeed.com
Teraspeed(SM) is the service mark of Teraspeed Consulting Group LLC
------------------------
------------------------------------------------------------------
To unsubscribe from si-list:
si-list-request@xxxxxxxxxxxxx with 'unsubscribe' in the Subject field
or to administer your membership from a web page, go to:
//www.freelists.org/webpage/si-list
For help:
si-list-request@xxxxxxxxxxxxx with 'help' in the Subject field
List FAQ wiki page is located at:
http://si-list.org/wiki/wiki.pl
List technical documents are available at:
http://www.si-list.org
List archives are viewable at:
//www.freelists.org/archives/si-list
or at our remote archives:
http://groups.yahoo.com/group/si-list/messages
Old (prior to June 6, 2001) list archives are viewable at:
http://www.qsl.net/wb6tpu
------------------------------------------------------------------
To unsubscribe from si-list:
si-list-request@xxxxxxxxxxxxx with 'unsubscribe' in the Subject field
or to administer your membership from a web page, go to:
//www.freelists.org/webpage/si-list
For help:
si-list-request@xxxxxxxxxxxxx with 'help' in the Subject field
List FAQ wiki page is located at:
http://si-list.org/wiki/wiki.pl
List technical documents are available at:
http://www.si-list.org
List archives are viewable at:
//www.freelists.org/archives/si-list
or at our remote archives:
http://groups.yahoo.com/group/si-list/messages
Old (prior to June 6, 2001) list archives are viewable at:
http://www.qsl.net/wb6tpu
Other related posts:
