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:
May. 10, 2005
Filed:
Feb. 26, 2003
Shigeyuki Mikami, Yokohama, JP;
Kiyoharu Kochi, Ehime-ken, JP;
Akiko Kochi, Ehime-ken, JP;
Hiroyasu Matsuzaki, Yokohama, JP;
Kazutaka Mukaiyama, Sagamihara, JP;
Koichi Sakamoto, Yokohama, JP;
Yohei Ishikawa, Yokohama, JP;
Shigeyuki Mikami, Yokohama, JP;
Kiyoharu Kochi, Ehime-ken, JP;
Akiko Kochi, Ehime-ken, JP;
Hiroyasu Matsuzaki, Yokohama, JP;
Kazutaka Mukaiyama, Sagamihara, JP;
Koichi Sakamoto, Yokohama, JP;
Yohei Ishikawa, Yokohama, JP;
Murata Manufacturing Co., Ltd., Kyoto, JP;
Abstract
A high-frequency circuit device includes a dielectric substrate. A planar conductor is provided on each of top and bottom surfaces of the dielectric substrate and a slot line is formed on the top surface. Also, undesired-wave propagation preventing circuits, each including multistage band-elimination filters, are provided on the top surface of the dielectric substrate, with the slot line therebetween. Each of the band-elimination filters includes two conductive lines and a resonator which is provided at a portion of one of the conductive lines and which includes two spiral lines. Accordingly, propagation of an undesired wave of the band whose center is the resonance frequency of the resonator can be prevented.