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:
Sep. 18, 2012
Filed:
Nov. 25, 2008
Keisuke Fukamachi, Saitama, JP;
Shigeru Kemmochi, Saitama, JP;
Keisuke Fukamachi, Saitama, JP;
Shigeru Kemmochi, Saitama, JP;
Hitachi Metals, Ltd., Tokyo, JP;
Abstract
A band-pass filter according to the present invention includes two or more resonant lines arranged side by side in a direction orthogonal to a laminating direction in a laminate substrate formed by laminating plural dielectric layers. Each of the resonant lines has a first coil pattern portion formed in the dielectric layers and a second coil pattern portion formed in the dielectric layers different from the dielectric layers in which the first coil pattern portion is formed. The first and second coil pattern portions are connected in series and formed in a spiral shape. At least one of the first and second coil pattern portions is formed as parallel lines in the plural dielectric layers. According to such a configuration, a band-pass filter that is reduced in size and reduced in loss is provided.