Title:
MANUFACTURING METHOD OF NON-RECIPROCAL CIRCUIT ELEMENT, THE NON-RECIPROCAL CIRCUIT ELEMENT AND COMMUNICATIONS EQUIPMENT
Document Type and Number:
Japanese Patent JP3593980
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To easily and inexpensively construct a highly reliable non-reciprocal circuit element, in which a resin layer is formed on the surface of a metal case.
SOLUTION: Each terminal of a central conductor 5 is arranged in a ferrite 4, so as to form a prescribed angle. The ferrite 4, the central conductor 5, a permanent magnet for applying a static magnetic field to the ferrite 4 and the central conductor 5, a resistor R and capacitors C are arranged in a resin case 1 provided with an input/output terminal 7 and ground terminals 8. The resin case 1 is sandwiched above and below by an upper yoke 2 and a lower yoke 3, on the surfaces of which a resin layer made from a thermosetting resin is respectively formed. In this structure, the thermosetting resin is cured at the same time with the thermal demagnetization of the permanent magnet.
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Inventors:
Takashi Hasegawa
Application Number:
JP2001004047A
Publication Date:
November 24, 2004
Filing Date:
January 11, 2001
Export Citation:
Assignee:
MURATA MANUFACTURING CO.,LTD.
International Classes:
H01P1/36; H01P1/383; H01P1/387; H01P11/00; (IPC1-7): H01P1/36; H01P1/383
Domestic Patent References:
| JP10200307A | ||||
| JP6231947A | ||||
| JP6196907A |
Attorney, Agent or Firm:
Hisao Komori