mm-wave resonant and nonresonant structures with high-Tc superconductors

Data on studying electrodynamic structures which, in the author´s opinion, are the most suitable for impedance properties measurement of HTS materials in mm wavelength range, are presented. Two versions of quasi-optical dielectric resonators (QDR) with HTS samples, perturbed resonator and two-conducting end-plates resonator, are considered. The examples of their usage are given and other versions are proposed. Their application aspects are discussed. The results of reflectivity study of HTS thin-film-dielectric substrate structures at grazing incident angles show a new approach to investigation of these materials Experimental data are obtained using sapphire QDR and rectangular waveguide E-structures with YBa₂Cu₃O_7-x thin films and melt textured samples in 8 mm waveband at T=77-300 K