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:
Feb. 08, 2000
Filed:
Feb. 05, 1997
Kenji Ito, Nagoya, JP;
Seigo Hino, Nagoya, JP;
NGK Spark Plug Co., Ltd., , JP;
Abstract
A dielectric filter having a plurality of dielectric coaxial resonators provided on a dielectric ceramic block, which is capable of equalizing the resonance frequencies of all the dielectric coaxial resonators with ease, and a method for adjusting the resonance frequency of the dielectric filter, in which one or more counterbores is provided for adjusting the substantial resonance frequency of each of the dielectric coaxial resonators or for coping with a tendency toward any deviation of the resonance frequency based on the structure of the dielectric filter. Each counterbore has a diameter larger than that of an inner conductor of each of the dielectric coaxial resonators.