Dear Guzek, Good morning (Taiwan Time). Your experience is similar to 3-H rule. Thanks for your sharing.... Best regards, Cortex=20 -----Original Message----- From: si-list-bounce@xxxxxxxxxxxxx = [mailto:si-list-bounce@xxxxxxxxxxxxx]On Behalf Of Slawek Guzek Sent: Wednesday, December 01, 2004 6:21 AM To: si-list@xxxxxxxxxxxxx Subject: [SI-LIST] Re: symmetry vs length matching for diff signals Dear Cortex, I'm working in low microwave, (I think area more=20 careful about coupling between different structures)=20 and even in microstrip traces, where coupling between=20 structures is greater, in almost all cases I use=20 simple rule of thumb:=20 When distance between two traces is greater more=20 than twice of substrate height I consider both=20 structures as practically decoupled. Maybe it will work for you good, too. Regards, Slawek Guzek. > -----Original Message----- > From: si-list-bounce@xxxxxxxxxxxxx > [mailto:si-list-bounce@xxxxxxxxxxxxx]On Behalf Of Cortex Chen > Sent: Tuesday, November 30, 2004 12:31 PM > To: si-list@xxxxxxxxxxxxx > Subject: [SI-LIST] Re: symmetry vs length matching for diff signals >=20 >=20 > Dear Abe Riazi, > How to determine the tightly and loosely coupled pairs? >=20 > Regards, >=20 > Cortex >=20 >=20 >=20 >=20 > ------------------------------------------------------------------ > 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: =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 ------------------------------------------------------------------ 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