The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 20, 2001
Filed:
Apr. 14, 1999
Jun Toda, Ishikawa-ken, JP;
Takashi Maruyama, Kanazawa, JP;
Jinsei Ishihara, Kanazawa, JP;
Hideyuki Kato, Ishikawa-ken, JP;
Abstract
The invention provides a dielectric filter, comprising: a dielectric block including a first surface and a second surface opposite to each other; a resonator hole extending between the first surface and second surface of the dielectric block, said resonator hole including a large-sectional area portion, a small-sectional area portion and a step portion between the large-sectional area portion and the small-sectional area portion; an inner conductor provided on the inner surface of the resonator hole; an outer conductor provided on the outer surface of the dielectric block; the inner conductor being electrically left unconnected to the outer conductor at the first surface of the dielectric block and being electrically connected to the outer conductor at the second surface of the dielectric block; and a seat portion provided on the first surface of the dielectric block such that the first surface serves as a mounting surface of the dielectric filter.