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. 23, 2003
Filed:
Aug. 16, 2001
Tatsuya Matsunaga, Yasu-gun, JP;
Hiroshi Marusawa, Moriyama, JP;
Murata Manufacturing Co., Ltd., Kyoto-fu, JP;
Abstract
As a magnetic material for high frequencies provided in a high-frequency circuit component used as a high-frequency nonreciprocal circuit device, for example, a circulator and an isolator, a magnetic material which can be densely sintered at a relatively low temperature and has a reduced ferromagnetic resonance half width is provided. The magnetic material for high frequencies is primarily composed of yttrium iron-based garnet in which Ca substitutes for a part of Y site, and V substitutes for a part of Fe site, and does not substantially contain tetravalent nor pentavalent elements, other than V, or contains about 0.5% by weight or less of oxide of this element, and the ratio of Ca atoms to V atoms, Ca/V, falls within the range of 2.0<Ca≦2.4.