I have not used these devices, but have seen them advertised for years by a company called Damaskos (www.damaskosinc.com) _______________________ Mike Kauffman Infinera, Incorporated -----Original Message----- From: Haddadin, Farah [mailto:Farah.Haddadin@xxxxxxxxx]=20 Sent: Monday, December 01, 2003 8:51 AM To: si-list@xxxxxxxxxxxxx Subject: [SI-LIST] Re: Dielectric Constant - thin materials - DC to 10GHz Hello everyone, I am looking for a fixture that is capable of measuring permittivity of thin materials from DC - 10GHz. There are two issues here: 1) The wide band of frequency: do I have to create two fixtures: one for low frequency and one for high? 2) The thickness of the material to be tested: I was told that the thickness of the material should roughly be: 20/sqrt(Er) [mm]. For example, for a permittivity of 4, the thickness of the material under test should be 10 mm. This is a conservative thickness estimator, but the thickness of the materials of my interest is 0.1mm - 1mm. I would greatly appreciate it if someone can point me to an existing fixture or methodology to test such thin materials for the frequency range mentioned above. Also, is there any reading material on the web on how to create fixtures? Thank you, Farah ------------------------------------------------------------------ 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.org List archives are viewable at: =20 //www.freelists.org/archives/si-list or at our remote archives: http://groups.yahoo.com/group/si-list/messages=20 Old (prior to June 6, 2001) list archives are viewable at: http://www.qsl.net/wb6tpu =20 Infinera Confidential: This message is intended only for the use of the individual or entity, = to which it is addressed and may contain information that is privileged, = confidential, and/or exempt from disclosure by applicable law or court = order. If the reader of this message is not the intended recipient, or = the employee or agent responsible for delivering the message to the = intended recipient, you are hereby notified that any use, dissemination, = distribution, or copying of this communication is strictly prohibited. = If you have received this communication in error, please notify us = immediately by return e-mail at the above address and delete all copies = of this message from your computer systems. Thank you. ------------------------------------------------------------------ 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.org 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