Why, yes it is possible to have two modes in stripline. Coax, no. good question. stripline has a "parallel plate waveguide" mode, and it has the typical stripline mode. Each of these modes are TEM, and are degenerate (from DC to daylight). one must be careful with the geometry so that the mode of operation does not excite the other mode. -craig >===== Original Message From doug@xxxxxxxxxx ===== >Thank you all for a very extensive and informative discussion re even and >odd mode. > >I still have one remaining question. Is it possible to have a "common >mode" signal in a single transmission line system (such as a stripline >transmission line)? Or is what we commonly call "Common Mode" actually >restricted to "even mode" currents in a two (or more) line system? > >After all the effort you went to in the previous thread, I hope this >question is at least framed correctly!! > >Doug Brooks ------------------------------------------------------------------ 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 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