BAND-PASS FILTER

摘要

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

主权项

1. A band-pass filter, comprising:
a body; a rectangular waveguide defined in the body, the waveguide having wide walls and narrow walls of a×b cross-section, wherein a is a length of the wide wall of the waveguide, b is a length of the narrow wall of the waveguide, and each wide wall is provided at a central portion thereof with a fixing groove; and a dielectric insert having two ends, the two ends are placed in the fixing grooves respectively and are symmetric with a perpendicular bisecting plane of the wide wall, the dielectric insert further comprising a dielectric plate and a high temperature superconductive film line with a number of rectangular windows of a same height, wherein each wide wall is provided with a rectangular recess, and in the rectangular recess, the fixing groove is formed; the rectangular recess is symmetric with the perpendicular bisecting plane of the wide wall, has a same length as the waveguide; and a width w of the rectangular recess is less than a and is greater than a total thickness t of the dielectric plate and the high temperature superconductive film.