[SI-LIST] Re: questions for 2-layer PCB simulation

Bill, yes adding a plane far enough away that it effectively has "zero+" 
coupling usually does the trick.  The one inch is not critical.  If the 
board is going into a metal chassis, a slightly more accurate result is 
obtained by setting the air gap to the distance between the board and metal 
surfaces.

Regards,

Steve.
At 09:20 PM 9/28/2005 -0700, Hargin, Bill wrote:
>Hi Tina:
>
>I can't speak for other simulation tools, but in HyperLynx, you would
>import the 2-layer board, and then add a 1000 mil thick layer of air
>(Er=3D1.0), followed by a reference plane.  Both the field solver guys =
>and
>customers who have tried this say that it works well.  If you want to
>validate this approach on one of your designs, let me know, and I'll try
>to connect you with the right people.=20
>
>Bill Hargin
>Product Manager - HyperLynx
>Mentor Graphics Corp.
>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
> > ------------------------------------------------------------------
> > To unsubscribe from si-list:
> > si-list-request@xxxxxxxxxxxxx with 'unsubscribe' in the Subject field
> >=20
> > or to administer your membership from a web page, go to:
> > http://www.freelists.org/webpage/si-list
> >=20
> > For help:
> > si-list-request@xxxxxxxxxxxxx with 'help' in the Subject field
> >=20
> > List FAQ wiki page is located at:
> >                 http://si-list.org/wiki/wiki.pl?Si-List_FAQ
> >=20
> > List technical documents are available at:
> >                 http://www.si-list.org
> >=20
> > List archives are viewable at:    =20
> >               http://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
> >  =20
> >=20
> >=20
>------------------------------------------------------------------
>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:
>http://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?Si-List_FAQ
>
>List technical documents are available at:
>                 http://www.si-list.org
>
>List archives are viewable at:
>                 http://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:
http://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?Si-List_FAQ

List technical documents are available at:
                http://www.si-list.org

List archives are viewable at:     
                http://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: