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. 31, 1999
Filed:
Oct. 17, 1997
Shoji Ono, Nagoya, JP;
NGK Spark Plug Co.,Ltd., Nagoya, JP;
Abstract
In a dielectric filter comprising a dielectric ceramic block which is provided with three or more than three resonators juxtaposed and a pair of input/output pads formed on the peripheral surface of the dielectric ceramic block, arranged opposite to each other at locations close to a short-circuiting end surface of the dielectric ceramic block and facing the respective outermost resonators and electrically connected to the respective outermost resonators by way of respective connecting conductive paths, the effect of lowering the resonant frequency of the outermost resonators by the input/output pads can be offset by arranging a strip-shaped electrode-free zone extending from the edge of the opening of the central resonator in the direction perpendicular to the longer edges of the short-circuiting end surface.