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:
Aug. 10, 1999
Filed:
Oct. 17, 1997
Shoji Ono, Aichi, JP;
NGK Spark Plug Co., Ltd., Aichi, JP;
Abstract
In a dielectric filter comprising a dielectric ceramic block which is provided with three or more than three resonators arranged in parallel with each other and a pair of input/output pads formed on a lateral side of the dielectric ceramic block, arranged at locations close to the open top of the dielectric ceramic block and facing the respective outer resonators and capacitively coupled to the respective outer resonators, the effective resonant length of the outer resonators is increased by forming extended conductors extending from the respective edges of the openings of the outer resonators to minimize the effect of the input/outputs and make the resonant frequencies of the outer resonators agree with that of the central resonator.