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:
Nov. 30, 1999
Filed:
Aug. 05, 1997
Jun Toda, Ishikawa-ken, JP;
Haruo Matsumoto, Kanazawa, JP;
Abstract
A dielectric filter having plural resonator cavities in a dielectric block, at least one resonator cavity comprising a large inner-diameter portion, a small inner-diameter portion and a diameter-changing portion formed between the large and small portions, an inner conductor being formed on the inner surface of each of the resonator cavities. The large and small inner-diameter portions of the stepped resonator cavity may have different sectional shapes, and may be either coaxial or non-coaxial. One of the portions may have an elongated cross-sectional shape and/or be arranged obliquely with respect to the dielectric block. One of the portions may moreover be arranged eccentrically with respect to the other portion.