Hi! all I am looking for accurate method of dielectric constant of PCB according to frequency. What is the best solution between 0.1GHz to 40GHz.(or 20GHz) Sometimes there is some defects in some methods such as calculating k factor, eliminating resonance effect, or inperfect deembedding method. Happy lunar new year!! HKKim »õ·Î¿î ±âºÎ¹®ÈÀÇ ¾¾¾Ñ, ÇØÇǺó ------------------------------------------------------------------ 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 technical documents are available at: http://www.si-list.net 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