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:
Oct. 23, 2007
Filed:
Jul. 06, 2005
Kenji Endou, Tokyo, JP;
Takahide Kurahashi, Tokyo, JP;
Sakae Henmi, Tokyo, JP;
Hidenori Ohata, Tokyo, JP;
Kenji Endou, Tokyo, JP;
Takahide Kurahashi, Tokyo, JP;
Sakae Henmi, Tokyo, JP;
Hidenori Ohata, Tokyo, JP;
TDK Corporation, Tokyo, JP;
Abstract
A technique for improving a circulator element for its temperature characteristic is provided. A circulator element including a garnet type ferrite material, and a permanent magnet for applying a direct-current magnetic field to the garnet type ferrite material, wherein Srepresents the saturation magnetization of said garnet type ferrite material at a temperature TSrepresents one at a temperature Tand Srepresents one at a temperature Tand Srepresents the saturation magnetization of said permanent magnet at a temperature TSrepresents one at a temperature Tand Srepresents one at a temperature Twhere TTTand the saturation magnetizations SSSSSand Sare relative values providing that the saturation magnetizations at the temperature Tis 1, and