[SI-LIST] Re: questions for 2-layer PCB simulation
- From: "???" <tinawu@xxxxxxxxxxxxxx>
- To: "Ralf Bruening" <ralf.bruening@xxxxxxxx>, "Hargin, Bill" <bill_hargin@xxxxxxxxxx>
- Date: Fri, 30 Sep 2005 10:01:37 +0800
Dear All,
Thanks for your reply. Here, I added a ground plane to close to
the real impedance at time-domain. But it doesn't work at frequency
domain. If I add a ground plane, it'll destroy the structure. That I can't
get the exact resonant frequency. Maybe I will get more correct results
by another way. Thanks!!
Best Regards
Tina
----- Original Message -----
From: "Ralf Bruening" <ralf.bruening@xxxxxxxx>
To: "Hargin, Bill" <bill_hargin@xxxxxxxxxx>
Cc: <tinawu@xxxxxxxxxxxxxx>; <si-list@xxxxxxxxxxxxx>
Sent: Thursday, September 29, 2005 1:55 PM
Subject: Re: [SI-LIST] Re: questions for 2-layer PCB simulation
> Hello Tina, hello Bill,
>
> what you describe is trying to trick the physics a little bit (as
> there is no determined Zo without a ground plane) - I made as
> well the experience that this may (but not must !!!) model reality
> rather OK for getting an idea of the net behaviour.
>
> regards
>
> Ralf
>
> P.S.: Some other SI tools do add this plane (changable by an
> option) automatically when launching the field solver and not
> detecting a reference layer ;-)
>
>
> Thursday, September 29, 2005, 6:20:29 AM, you wrote:
>
> HB> Hi Tina:
>
> HB> I can't speak for other simulation tools, but in HyperLynx, you would
> HB> import the 2-layer board, and then add a 1000 mil thick layer of air
> HB> (Er=3D1.0), followed by a reference plane. Both the field solver guys
=
> HB> and
> HB> customers who have tried this say that it works well. If you want to
> HB> validate this approach on one of your designs, let me know, and I'll
try
> HB> to connect you with the right people.=20
>
> HB> Bill Hargin
> HB> Product Manager - HyperLynx
> HB> Mentor Graphics Corp.
> HB> 425-301-4425 - Mobile
>
> >> -----Original Message-----
> >> From: si-list-bounce@xxxxxxxxxxxxx=20
> >> [mailto:si-list-bounce@xxxxxxxxxxxxx] On Behalf Of=20
> >> tinawu@xxxxxxxxxxxxxx
> >> Sent: Tuesday, September 27, 2005 7:20 PM
> >> To: si-list@xxxxxxxxxxxxx
> >> Subject: [SI-LIST] questions for 2-layer PCB simulation
> >>=20
> >> Dear All,
> >> I have simulated the SI and PI for 2-layer PCB. I found=20
> >> some tools based on 2D EM method.
> >> It makes the results wrong. Could you tell me how to close to=20
> >> the real condition by setting some parameters or adding some=20
> >> planes?? Thanks in advance.
> >> Best Regards
> >> Tina
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>
> _____________________________________________
>
> Ralf Bruening
> Product Manager High Speed Design/Partner & Solution Business
> Zuken EMC Technology Center
> Vattmannstr.3
> 33100 Paderborn
> Germany
>
>
> Tel: ++49 (0) 5251 150 600 (direct -621)
> Fax: ++49 (0) 5251 150 700
> Cellular: +49 170 4228512 (alternative: +49 172 9070675)
>
> Email: ralf.bruening@xxxxxxxx
> Web: www.zuken.com
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