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:
Dec. 01, 1998
Filed:
Mar. 24, 1997
Shoji Ono, Nagoya, JP;
Masaki Shibata, Nagoya, JP;
NGK Spark Plug Co., Ltd., , JP;
Abstract
A dielectric filter for a high frequency band includes a plurality of resonators formed by boring a plurality of through holes between the oppositely disposed end surfaces of a dielectric block in parallel with each other and arranging internal conductors on the inner peripheral surfaces of the respective through holes and an external conductor formed on a substantial portion of the outer peripheral surface of the dielectric block. A non-conductive region is formed on the short-circuit end surface and extends in parallel with the direction connecting the resonators, thereby the filter can be controlled satisfactorily for coupling the dielectric coaxial resonators and have a reduced height.