[SI-LIST] Re: tools for really high speed

In the fyi category...

In the sparam to hspice or pspice category...  The FWS add-on to HFSS is
very good.

At 40 GHz... And ESPECIALLY at 300GHz.. The geometric mesh resolution of
the mesh of your tool comes into play in a huge way.  So depending on
your structures, you may want to do some detail study on the priciples
behind the mesh generation.  For typical structures... At 80 GHz and
above... I would suggest structural meshing would be advantageous.

BR
ap




-----Original Message-----
From: si-list-bounce@xxxxxxxxxxxxx [mailto:si-list-bounce@xxxxxxxxxxxxx]
On Behalf Of Scott McMorrow
Sent: Friday, October 29, 2004 9:28 PM
To: lgreen22@xxxxxxxxxxxxxx
Cc: 'si-list'
Subject: [SI-LIST] Re: tools for really high speed


Lynne,

CST Microwave Studio and Ansoft HFSS can both handle the 3D full wave 
simulations at these frequencies.   To create spice-type models you will

need to convert s-parameters derived from these tools into passive 
time-domain simulation models.  There are several commercial tools on 
the market that perform this function.  I have validated Sigrity 
Broadband Spice with CST Microwave Studio to 40 GHz. and 50 Gbps 
signalling against measurement, with the end simulations being done in 
HSpice.

scott


lgreen wrote:

>Please reply offline:
>
>Does anyone have any recommendations for extraction and simulation 
>tools for data rates at 40 GHz (harmonics to 300 GHz)?
>
>Interconnects for both board and package need to be extracted with the 
>field solver; S-parameter models would be acceptable.
>
>SI simulation could be done in an SI simulator or in a SPICE-type 
>simulator. However, the signals are already known to violate the 
>quasi-static assumption (higher order modes carry significant signal 
>energy).
>
>- Lynne
>
>
>
>"IBIS training when you need it, where you need it."
>
>Dr. Lynne Green
>Green Streak Programs
>http://www.greenstreakprograms.com
>425-788-0412
>lgreen22@xxxxxxxxxxxxxx
>
>
>
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-- 
Scott McMorrow
Teraspeed Consulting Group LLC
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