Barannik A. Electrodynamic properties of quasi-optical Hakki-Coleman resonator and using of it for mi-crowave investigations of superconductors

The object of investigation is microwave characteristics of supercon-ductors. The subject of investigation is microwave characteristics of high temperature superconducting thin films in millimeter wave range. Possibility of surface resistance measurement of high temperature superconductors in the millimeter wave range without calibration procedure using the quasioptical Hakki-Coleman resonator is offered and experimentally justified. Possibility of using of the quasioptical Hakki-Coleman resonator for research of temperature surface reactance dependences of high temperature superconductors is shown. Method which allows one to measure of quasioptical Hakki-Coleman resonator quality under the conditions of removal of degeneration of whispering gallery wave is offered and justified. Evolution of spectrum of the quasioptical Hakki-Coleman resonator at the change of height of dielectric disk, diameter of conducting endplates and diameter of the disk hole is experimentally investigated. Possibility of measuring absolute values of complex permittivity of dielectrics including liquids is shown using the quasioptical Hakki-Coleman resonator. For the first time the whispering gallery waves directly have been excited in liq-uids. Scope of the use – radiophysics of condensed matter, microwave physics