hello,

I am interested in the dielectric constant and dielectic loss factor of
E-glass type fibers in function of frequency. I have searched the web and
literature for data on this subject, but I have only found conflicting
data.

My interest is purely for +50MHz frequencies, the E-glass has a chemical
composition as defined in IPC-EG-140: B2O3 (5-10%), CaO (16-25%), Al2O3 (12-16%,
SiO2 (52-56%), MgO (<5%),Na+K2 (0-2%), TiO2 (0-0.8%), Fe2O3 (<0.4%), F2 (<1%)


Your help is kindly appreciated. Data, references, brochures, ..., everything
is welcome.


Jan Vercammen
Agfa
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