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:
Jun. 02, 2009
Filed:
Nov. 20, 2007
Takeshi Okano, Omihachiman, JP;
Takahiro Baba, Omihachiman, JP;
Takeshi Okano, Omihachiman, JP;
Takahiro Baba, Omihachiman, JP;
Murata Manufacturing Co., Ltd., Kyoto-fu, JP;
Abstract
A dielectric resonator having a line pattern that includes an electrode gap that defines a signal input/output portion provided on an open side, and a ground portion provided on a short-circuited side. The length L in a main direction of a portion of the line pattern in which the signal input/output portion and the ground portion face each other is smaller than one quarter the wavelength of a resonant signal of the resonator. A variable-capacitance element is connected to the signal input/output portion. One end of the variable-capacitance element has a positive potential and the other end of the variable-capacitance element has a negative potential.