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:
Jun. 24, 2003
Filed:
Oct. 13, 1999
Hiromu Tokudera, Nagaokakyo, JP;
Katsuyuki Ohira, Otsu, JP;
Murata Manufacturing Co., Ltd., Kyoto, JP;
Abstract
A nonreciprocal circuit device can be reduced in size by omitting an impedance matching circuit. The nonreciprocal circuit device includes a ferrite member, a plurality of mutually intersecting central conductors disposed in proximity to the ferrite member, and a magnet for applying a DC magnetic field. The plurality of central conductors have lengths of substantially &lgr;g/2 or a multiple thereof with respect to a wavelength &lgr;g at a usable frequency. One end of each of the central conductors is connected to an input/output terminal, and the other end thereof is disconnected so as to be an electrically open end. Alternatively, the central conductors may have lengths of substantially &lgr;g/4 or a multiple thereof, the other ends thereof being grounded.