Hi, expert In RF Circuit or signal integrity text book, it tell us if the load impedance do not equal transmission line charateritic impedance,the reflection will occur. But how did we explain this reflection in the aspect of wave? Did the resistor show himself a boundary condition? Could some recommand some documents or text book on this subject? Thanks Tesla. ------------------------------------------------------------------ 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