Chinese Academy of Sciences

University of Science and Technology Beijing

Beijing Huaronttianchuang Superconduct Tech Dev Co

Usikov Inst Radiophysics & Electronics, Nasu

Myhaylo Natarov

Hong Li

Xu Wang

Liang Sun

Jia Wang

Yun Wu

Sheng Luo

Mykola Cherpak

Valerii Skresanov

Oleksandr Barannyk

Volodymyr Glamazdin

Yusheng He

Jiangming Huang

Volodymyr Zolotarev

Oleksandr Shubnyj

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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Kharkiv, Ukraine

Myhaylo Natarov