Hi all, Recently there have been extensive discussions on the effects of traces passing over plane breaks. As a matter of fact, a series of tests on = the effects of trace passing plane breaks were conducted at Sigrity, and = test results were compiled in an internal report (written about 3 years ago) which can now be shared at: http://www.sigrity.com/support/internalbenchmark/traceoversplit/TraceOver= Spl itPlane.pdf These tests demonstrate the impacts of plane breaks which include: -Signal integrity degradation on active lines -Increased coupling between adjacent lines -Noise generated between metal planes -Both microstrip and stripline structures are included These tests were carried out by numerical solution of Maxwell's = equations with 3-dimenstional finite-difference time-domain (FDTD) method. = Sigrity's SPEED2000 solutions of the same structures were also provided and = compared. For those of you who have SPEED2000, you are welcome to request the SPEED2000 data files (spd files) for the test cases presented in the = report. Once you get the data files, you can revise the files to fit to your own test case structures. Best regards, Sam ------------------------------------------------------------------ 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