Hello and thank you to all that have responded -. I left out an important piece of detail: Due to space constraints the concept of the double curve approach is not feasible and some other designs (a large bulge in one pair or little bulges along the length of one pair) are being proposed. Has anyone done a study of the "non- serpentine" alternatives for skew control.? [I don't have access to a 3M modeling tool :() Best Regards Charles Grasso Compliance Engineer Echostar Communications (w) 303-706-5467 (c) 303-204-2974 (t) 3032042974@xxxxxxxxx (e) charles.grasso@xxxxxxxxxxxx (e2) chasgrasso@xxxxxxxxx From: Grasso, Charles Sent: Tuesday, October 21, 2014 1:22 PM To: si-list@xxxxxxxxxxxxx Subject: [Recrafted] Serpentining of Differential Pairs [Recrafted - Sorry!] Hello all, I have a question on how to achieve length symmetry of differential pairs using serpentine designs. What is the "best" (or "least worst"!) serpentine design that can be used to minimize the mode conversion that is the inevitable result of having a serpentine in the first place? (I have a wealth of information on the effects of vias (placement/symmetry and so on) but I seem to be coming up short on the relative merits of the different types/styles of serpentine design.) Thanks! Best Regards Charles Grasso Compliance Engineer Echostar Communications (w) 303-706-5467 (c) 303-204-2974 (t) 3032042974@xxxxxxxxx<mailto:3032042974@xxxxxxxxx> (e) charles.grasso@xxxxxxxxxxxx<mailto:charles.grasso@xxxxxxxxxxxx> (e2) chasgrasso@xxxxxxxxx<mailto:chasgrasso@xxxxxxxxx> ------------------------------------------------------------------ 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 forum is accessible at: http://tech.groups.yahoo.com/group/si-list List archives are viewable at: //www.freelists.org/archives/si-list Old (prior to June 6, 2001) list archives are viewable at: http://www.qsl.net/wb6tpu