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:
Feb. 24, 2004
Filed:
Feb. 02, 2001
Shigeru Takeda, Kumagaya, JP;
Yasushi Kishimoto, Tottori, JP;
Hiroyuki Itoh, Iwami-gun, JP;
Kouji Ichikawa, Ohmiya, JP;
Shuichi Watanabe, Tottori, JP;
Hitachi Metals, Ltd., Tokyo, JP;
Abstract
A concentrated constant, non-reciprocal device comprising a permanent magnet for applying a DC magnetic field to a ferrimagnetic body, an assembly in which at least a part of a plurality of center conductors one end of which serves as a common terminal and the other of which serves as a first input/output terminal is wound on or embedded in the ferrimagnetic body, a plurality of second input/output terminals, a plurality of impedance converting circuits connected between the second input/output terminals and the first input/output terminals, respectively, and a plurality of load capacitors connected between the first input/output terminals and the common terminals, respectively. The input impedance Z of the corresponding first input/output terminal at the operating center frequency and an external impedance Z connected with the corresponding second input/output terminal satisfy 0.05≦Z /Z ≦0.9. As a result, it is possible to provide a small concentrated constant circulator/isolator of a wide band width having excellent electric characteristics.