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:
Nov. 02, 2004
Filed:
Mar. 14, 2001
Murata Manufacturing Co., Ltd., Kyoto, JP;
Abstract
A method for easily adjusting the frequency of an attenuation pole in a dual-mode band pass filter which is very compact and greatly increases coupling strength while maintaining a great deal of freedom of design. The dual-mode band pass filter includes a metal film partially disposed on a main surface of a dielectric substrate or disposed inside of the dielectric resonator so as to define a resonator. An opening is formed in the metal film to couple two resonance modes. Input/output coupling circuits are coupled to the metal film. At least one of coupling portions of the input/output coupling circuits or input/output portions thereof are moved in a direction along a perimeter of the metal film.