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:
Sep. 07, 1999
Filed:
Feb. 01, 1996
Seigo Hino, Nagoya, JP;
NGK Spark Plug Co., Ltd., Nagoya, JP;
Abstract
There are provided a dielectric filter that shows a large effective bandwidth and a method of regulating the frequency bandwidth of a dielectric filter in order to achieve a large effective bandwidth, in which the dielectric filter comprises a dielectric ceramic block provided with three or more resonators arranged in parallel with each other and formed by respective resonant conductors, capacitive electrodes are provided at a position close to an electrically open-circuit end surface on one of four lateral surfaces of the dielectric ceramic block to respectively lie over the adjacently disposed resonant conductors, and a shield electrode provided on the lateral surface is partly removed at a position bordering the open-circuit end surface where the capacitive electrodes are located in order to form an insulation gap having a predetermined width.