Precise resonator methods investigation of dielectrics and metals at 40 GHz–500 GHz frequency range and in 4 K–900 K temperature interval

Resonator techniques for precise measurements of gazes and condensed media in wide frequency range from 40 GHz up to 500 GHz and in the temperature interval from 4 K up to 900 K are presented. The measurement methods are the absolute ones and self “calibrated” it means that it is not necessary to use the prior information. Concrete values are calculated from the measured of the resonator frequency and the resonator curves widths of empty and loaded resonator. The results of reflectivity investigations of extrapure metals and real alloys for cooled reflectors of modern radiotelescopes are presented.