Title:
非可逆回路素子及びその製造方法
Document Type and Number:
Japanese Patent JP4858543
Kind Code:
B2
Abstract:
To obtain a nonreciprocal circuit device which has a simple structure, permitting easy fabrication and also has satisfactory electrical characteristics, and to obtain a manufacturing method of the nonreciprocal circuit device. A nonreciprocal circuit device (a two-port isolator) includes permanent magnets (41), a ferrite (32) to which a direct current magnetic field is applied by the permanent magnets (41), first and second central electrodes arranged on the ferrite (32), and a circuit substrate (20). A ferrite-magnet assembly (30) mounted on the circuit substrate (20) is covered with a resin layer (10). The resin layer (10) is composed of an innermost layer (11) made of a non-magnetic resin material and a magnetic resin layer (12) having a magnetic filler mixed therein.
Inventors:
Takaya Wada
Application Number:
JP2008529399A
Publication Date:
January 18, 2012
Filing Date:
November 13, 2007
Export Citation:
Assignee:
MURATA MANUFACTURING CO.,LTD.
International Classes:
H01P1/36; H01F27/255; H01P1/383; H01P11/00
Domestic Patent References:
| JP2002016456A | 2002-01-18 | |||
| JPH09306715A | 1997-11-28 |
Foreign References:
| WO2006011383A1 | 2006-02-02 |
Attorney, Agent or Firm:
Takeichi Morishita
Tani Kazuhiro
Tani Kazuhiro