Vishram, the extra "[1]" breaks the link. This link works: http://pcdandm.com/pcdmag/mag/0404/0404pandit.pdf One of the big themes of that paper is the need to divide the PDS into=20 islands to push up cavity resonant frequencies. This is readily evidenced= =20 by the removal of the high peaks at even quarter wave multiples of the=20 original board. The authors used Sigrity to help refine their design for=20 the desired performance. But even a nice tool like Sigrity is not going to= =20 offer a magic way to fix a fundamentally flawed stack-up. Steve. At 05:14 AM 8/9/2004 +0000, Vishram Pandit wrote: > >Here is the correct link. > >http://pcdandm.com/pcdmag/mag/0404/0404pandit.pdf[1] > >Thanks, > >Vishram > > > > >From: "Vishram Pandit" <vishrampandit@xxxxxxxxxxx> >Reply-To: >vishrampandit@xxxxxxxxxxx >To: karthikeyan.loganathan@xxxxxx, >si-list@xxxxxxxxxxxxx >Subject: [SI-LIST] Re: EMI Containment >Date: Mon,= 09 >Aug 2004 05:03:35 +0000 >>>Karthik, >>>Here is previously published article >that delineates the EMI containment >methodology. It also discusses the >capacitors stitching. > >>>>http://pcdandm.com/pcdmag/mag/0404/0404pandit.pdf[1] >>>>Thanks, > >>Vishram Pandit >>> >From: "Loganathan, Karthikeyan (GE Consumer >&Industrial)" ><karthikeyan.loganathan@xxxxxx> >Reply-To: >karthikeyan.loganathan@xxxxxx >>To:<si-list@xxxxxxxxxxxxx> >Subject: >[SI-LIST] EMI Containment >Date: Sun, >8Aug 2004 19:32:48 +0530 >>Hi All, > >>Ifound a high speed (operated upto >1Ghz), dense board design total =3D > >10layers, out of which only one 3.3V >(layer2) Plane and One Gnd Plane = =3D > >(layer9). Other Power traces were routed >individually. >>To reduce the >radiation, they have provided Stitch >Capacitors=3D >(decoupling) between >layer2 &9, across the board. All the fast >=3D >switching signals were= routed >within these layers. >>I am sure, Stitch >capacitor technique reduces EMI, >but my question is, =3D >what extent?. Is >anybetter method available?= >>As >you know, the return current paths in the >stackup said has wide =3D > >seperation between signal and reference planes, >also the stitch =3D > >capacitors (SMT) added will have inherent Lead Inductance >and overall = =3D > >increases the board cost too. >>Thanks, >Karthik > >>------------------------------------------------------------------ >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?Si-List_FAQ > >>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 >June6,= 2001) >list archives are viewable at: > http://www.qsl.net/wb6tpu >= >>>>-----------------------------------------------------------------------= - >---- >FREE pop-up blocking with the new MSN Toolbar =AD get it now![2]= >>--- >Links --- > 1 http://pcdandm.com/pcdmag/mag/0404/0404pandit.pdf > 2 >http://g.msn.com/8HMBENUS/2752??PS=3D47575 > >------------------------------------------------------------------ >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?Si-List_FAQ >>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 >June6, 2001) list archives are viewable at: > http://www.qsl.net/wb6tpu= >> > >---------------------------------------------------------------------------= - >Is your PC infected? Get a FREE online computer virus scan from McAfee=AE >Security.[2] > >--- Links --- > 1=20 >= http://65.54.186.250/cgi-bin/linkrd?_lang=3DEN&lah=3D7cde3f4ba01fba0fd1= 1d300d25a011da&lat=3D1092028390&hm___action=3Dhttp%3a%2f%2fpcdandm%2= ecom%2fpcdmag%2fmag%2f0404%2f0404pandit%2epdf > 2 http://g.msn.com/8HMBENUS/2755??PS=3D47575 >------------------------------------------------------------------ >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?Si-List_FAQ > >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?Si-List_FAQ 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