Dielectric filter

Abstract

Abstract PURPOSE:To obtain an easily manufactured microwave dielectric filter by arranging a lower and an upper group of rectangular parallelepipeds consisting of plural dielectrics having stuck external conductors of resonators so that they face each other in contact with internal element constituent thin plates of a filter between. CONSTITUTION:The lower group of rectangular parallelepipeds (5-1)-(5-4) made of dielectrics having stuck metallic films for forming external conductors of the resonator on part of surfaces and the upper group of rectangular parallelepipeds (5-1')-(5-4') of the constitution are arranged in contact while facing each other so that the internal element constituent thin plate 12 of the filter equipped with input/output coupling elemnts 13 and 13', input/output coupling coaxial terminals 3 and 3', plural resonator internal conductors (14-1)-(14-4), grounding conductors (15-1)-(15-3) for interstage coupling prevention, and grounding conductors 16 and 16' is interposed. They are covered with metallic housings 1 and 1' and supporting plates 2 and 2' are fixed threadably to the housings 1 and 1' to obtain united constitution. The resonance frequencies of respective resonators depend upon the lengths of the conductors (14-1)- (14-4) and the degrees of coupling between the resonators depend upon adjacent intervals between the conductors (14-1)-(14-4); as the conductors (15-1)-(15-3) are narrower, the degrees of couplings are less and the band width is narrower.

Inventors

• 👤 Shinya Fujii
• 👤 信也 藤井

Bibliographic Details