Title:
IRREVERSIBLE CIRCUIT ELEMENT AND COMMUNICATION EQUIPMENT
Document Type and Number:
Japanese Patent JP3509762
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide an irreversible circuit element and communication equipment which are made compact and short.
SOLUTION: An irreversible circuit element 1 is constituted of a permanent magnet 9, a ferrite 20 whose DC magnetic flux is impressed by the permanent magnet 9, a plurality of center electrodes 21-23 arranged at the ferrite 20, and a lower case 4 and an upper case 8 in which the ferrite 20, the center electrodes 21-23, and the permanent magnet 9 are housed. Thickness t4 of the lower case 4 is set so as to be not less than 50% and less than 100% of thickness t8 of the upper case 8. The upper case 8 and the lower case 4 are made of metal consisting essentially of steel.
Inventors:
Hasegawa, Takashi
Application Number:
JP2001040857A
Publication Date:
March 22, 2004
Filing Date:
February 16, 2001
Export Citation:
Assignee:
MURATA MFG CO LTD
International Classes:
H01P1/383; H01P1/387; H01P1/36; (IPC1-7): H01P1/36; H01P1/383
Attorney, Agent or Firm:
森下 武一
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