Chinese Academy of Sciences

University of Science and Technology Beijing

Beijing Huarong Tianchuang Superconduct Technology Development Co., Ltd.

O. Ya. Institute for Radiophysics and Electronics of National Academy of Sciences of Ukraine

Beijing Huaronttianchuang Superconduct Tech Dev Co

Usikov Inst Radiophysics & Electronics, Nasu

Yusheng He

Hong Li

Xu Wang

Liang Sun

Jia Wang

Yun Wu

Sheng Luo

Mykola Cherpak

Valerii Skresanov

Oleksandr Barannyk

Volodymyr Glamazdin

Jiangming Huang

Oleksandr Shubny

Volodymyr Zolotarev

Myhaylo Natarov

Oleksandr Shubnyj

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.

Measuring whispering-gallery-mode resonator

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&#xd7;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&#x3c;w&#x3c;a/2, and depth d satisfying d&#x3c;&#x3bb;/4, t being total thickness of the dielectric plate and the high temperature superconductive film, and &#x3bb; the wavelength of the central frequency of the pass-band of the band-pass filter.

Rectangular band-pass filter having recesses of less than one-quarter wavelength depth formed therein for fitting a dielectric insert with a superconductive film within the recesses

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Yusheng He