Abstract: A measuring whispering-gallery-mode resonator includes: a dielectric resonating body with a rotation axis, a superconducting sample under test mounted to the resonating body and a coupling unit for coupling a measuring waveguide with the resonating body. One side of the resonating body connected with the coupling unit has a first endplate, in which m coupling holes penetrate through the first endplate, and centers of the m coupling holes are arranged to be evenly spaced along a circle whose center is on the rotation axis. The coupling unit has a feeder line which is a coaxial waveguide, and an axis of the coaxial waveguide coincides with the rotation axis. One end surface of the coaxial waveguide, which is perpendicular to the rotation axis, abuts the first endplate; and the azimuth index of operated whispering gallery mode in the resonator is an integer multiple of the number m of the coupling holes.

Abstract: A band-pass filter having a body, a rectangular waveguide, and a dielectric insert, the dielectric insert has a dielectric plate and a high temperature superconductive film in line with a plurality of rectangular windows of the same height. The waveguide has a×b cross-section, a being length of the long side walls and b the length of the short side walls. Each long side wall has a fixing groove at the central portion and a rectangular recess in the fixing groove. The dielectric plate has two ends in the fixing grooves and is symmetric with a perpendicular bisecting plane of the long side wall. The rectangular recess is symmetric to the perpendicular bisecting plane and has the same length as that of the waveguide, with its width w satisfying t<w<a/2, and depth d satisfying d<?/4, t being total thickness of the dielectric plate and the high temperature superconductive film, and ? the wavelength of the central frequency of the pass-band of the band-pass filter.

Abstract: Band-pass filter having a body comprising a rectangular waveguide and a dielectric insert comprising a dielectric plate and a high temperature superconductive film in line with a number of rectangular windows of the same height. The waveguide has a×b cross-section, a being length of the wide wall and b the length of the narrow wall. Each wide wall has a fixing groove at the central portion and a rectangular recess in the fixing groove. The dielectric plate has two ends in the fixing grooves and is symmetric with a perpendicular bisecting plane of the wide wall. The rectangular recess is symmetric to the perpendicular bisecting plane and has same length as the waveguide, with its width w satisfies t<w<a/2, and depth d satisfies d<?/4, t being total thickness of the dielectric plate and the high temperature superconductive film, and ? the wavelength of the central frequency of the pass-band of the band-pass filter.

Abstract: A measuring whispering-gallery-mode resonator, comprising: a dielectric resonating body with a rotation axis; a superconducting sample under test, which is mounted to the resonating body; a coupling unit for coupling a measuring waveguide with the resonating body, wherein one side of the resonating body connected with the coupling unit is provided with a first endplate, wherein m coupling holes penetrate through the first endplate, and centers of the m coupling holes are arranged to be evenly spaced along a circle whose center is on the rotation axis; the coupling unit has a feeder line which is a coaxial waveguide, wherein an axis of the coaxial waveguide coincides with the rotation axis, and one end surface of the coaxial waveguide, which is perpendicular to the rotation axis, abuts to the first endplate; and the axial index of operated whispering gallery mode in the resonator is an integer multiple of the number m of the coupling holes.