The return path is the path of minimum energy. As frequency increases "inductive effects" cause the return path to crowd beneath the signal line. john wilson ªü¥È wrote: > Dear all experts, > > I have a question that why the return current will return back > underneath the trace line? I realize the equation of this by using > mathematical formula, but not for its Electromagnetic phenomenon? > > Because I've studied from some articles of return Current or > Current Loop...etc, but all those topic said that " It'll reinforce a > electromagnetic field to make return current as close as possible to > the trace of forward signal. I'm confused that why electromagnetic > field make forward and return current closer, but not further ? > > Whether I can suppose it as a Differential Signal Piar similarly > of its electromagnetic field? > > Regards, > > Binchuan.Wang > > ------------------------------------------------------------------ > 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 > ------------------------------------------------------------------ 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