[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
>
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-- 

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
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