[Antennas] PLASTIC EGG MICROWAVE TEST

[Harvey&Bessie]

Ronald, I'm looking in "Reference Data for Radio Engineers" by ITT, fourth addition. There 
is a chart on pages 64 and 65 entitled Commercial Insulating Materials. It gives the 
dielectric constant and dissipation factor for 39 different materials at frequencies from 
60 Hz to 2.5 X10 to the 10th Hz. By analyzing these figures one will see that the 
dissipation factor is not a linear function of frequency as I assumed, but is better than 
that, rising very little as the frequency is increased, in fact with some materials it 
actually decreases. In any case the test at 2.5 Ghz appears to be a very good evaluation 
of the insulator's dissipation factor.
If anybody wants a copy of these pages I can send it as an attachment to you individually, 
(can't send attachments on the reflector)
73
Harvey/W4TG