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:
Jul. 16, 1991
Filed:
Dec. 29, 1989
Applicant:
Inventors:
Assignee:
Murata Manufacturing Co., Ltd., Kyoto, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01P / ; H01P / ;
U.S. Cl.
CPC ...
333208 ; 333202 ; 3332192 ;
Abstract
A magnetostatic wave filter comprises a waveguide having a cut-off frequency region. In this waveguide, a YIG thin film is installed as a ferrimagnetic base material. Also, the cut-off frequency region of this waveguide comprises an attenuation band of the magnetostatic wave filter. Electromagnetic wave in the attenuation band of the magnetostatic wave filter is attenuated by this waveguide.