IPC's Microwave pwb performance spec is IPC-HF-318. The high frequency design guidelines is IPC-D-316 and the high speed design is IPC-D-317. Regards Dave *************************************************** David W. Bergman, Technical Director IPC 2215 Sanders Road Northbrook, IL 60062-6135 708-509-9700 x340 Phone 708-509-9798 Fax email [log in to unmask] *************************************************** On Tue, 22 Aug 1995 [log in to unmask] wrote: > Does anyone know what the current IPC specification is regarding > microwave circuit design and construction? Also, is there any type of > instrument which a fabricator can use that measures controlled impedence > on PTFE microwave application boards. If so, where can it be purchased > from? Thanks. > > Robert Bormann > CircuitWorld > http://www.halcyon.com/rbormann/cirworld.htm > >