FREE-WAVE MEASUREMENT OF PERMEABILITY AND PERMITTIVITY OF FERRITES ATMILLIMETER-WAVE FREQUENCIES

From measurements of transmission through thin sheets and reflection f rom them, at oblique incidence, both the real and imaginary components of permittivity and permeability of a material can be determined. Exc ept for the generator, antenna and detector system, the apparatus is s uitable for any frequency from 15 to 100 GHz. The accuracy of measurem ent of the real components is believed to be about +/-5% and of the su m of the two loss angles about +/-0.05 rad, but at the present stage o f development values for the two losses separately are more difficult to find.