From: Dennis Rehm (email@example.com)
Date: Thu Nov 30 2000 - 12:36:00 PST
Having recently purchased Stephen Hall's recent book, "High Speed Digital
System Design" I found some good information on the frequency variations of
loss tangent and Dielectric constant in Ch. 4. However the plots shown for
FR4 are only to 1Ghz.
Is there any published information for the frequency variation of these two
parameters at frequencies up to 10Ghz or more?
Has anyone done any work in this area? The equation for Er variation was
derived empirically up to 1 Ghz so the accuracy above 1 Ghz is unknown. The
plot for tand variation has no associated equation.
Senior Systems Engineer
AMCC Interconnect Corporation
Fort Collins Colorado 80525
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