Try contacting Rogers. Ask for a copy of the "Blue Book" on microwave products. Jeffrey McGlaughlin Battelle Columbus -----Original Message----- From: Rhoads, Randall E [SMTP:[log in to unmask]] Sent: Wednesday, February 04, 1998 11:21 AM To: [log in to unmask] Subject: [TN] High-Frequency Dielectric Constant Does anyone have any sources of info on high-frequency dielectic constant for circuit materials, especially how it varies with frequency? I'm interested in the megahertz and gigahertz ranges. Thanks! Randy Randall E. Rhoads Development Engineer Electromagnetic Technology AMP Incorporated Harrisburg, PA 17105-3608 [log in to unmask] ################################################################ TechNet E-Mail Forum provided as a free service by IPC using LISTSERV 1.8c ################################################################ To subscribe/unsubscribe, send a message to [log in to unmask] with following text in the body: To subscribe: SUBSCRIBE TechNet <your full name> To unsubscribe: SIGNOFF TechNet ################################################################ Please visit IPC web site (http://jefry.ipc.org/forum.htm) for additional information. For the technical support contact Dmitriy Sklyar at [log in to unmask] or 847-509-9700 ext.311 ################################################################ ################################################################ TechNet E-Mail Forum provided as a free service by IPC using LISTSERV 1.8c ################################################################ To subscribe/unsubscribe, send a message to [log in to unmask] with following text in the body: To subscribe: SUBSCRIBE TechNet <your full name> To unsubscribe: SIGNOFF TechNet ################################################################ Please visit IPC web site (http://jefry.ipc.org/forum.htm) for additional information. For the technical support contact Dmitriy Sklyar at [log in to unmask] or 847-509-9700 ext.311 ################################################################