Title:
NON-RECIPROCAL CIRCUIT ELEMENT
Document Type and Number:
WIPO Patent Application WO/2012/095933
Kind Code:
A1
Abstract:
Provided is a non-reciprocal circuit element having a simple structure and superiority in assembly, with which it is possible to prevent ferrite plate fracturing and implement a lower profile and miniaturization with ease. In the present invention: a central conductor (1), wherein oscillators (3) which each extend outward are formed between I/O terminals (2a-2c) which extend outward in a Y-shape from the center of the main body; upper and lower ferrite plates (5, 6) which sandwich the central conductor (1) therebetween, including the oscillators (3); and upper and lower part magnetic metal plates (7, 8) which sandwich the upper and lower ferrite plates therebetween; are stacked. A magnet (10) is positioned upon the upper magnetic metal (7). By forming curved parts (4) in the leading end parts (3a) of the oscillators (3) of the central conductor (1), which are bent in a direction out of the plane and form an interstice (G) between the central conductor (1) and the upper ferrite plate (5), the upper ferrite plate (5) is disposed to be freely detachable from the central conductor (1) by the elasticity of the curved parts (4). Additionally, the present invention provides a non-reciprocal circuit element with which it is possible, without excessively increasing the magnetic field strength of a magnet, to obtain a desired circulator characteristic, and which is further usable in a wideband including especially high-frequency bands. To this end, provided is a non-reciprocal circuit element whereon the I/O terminals (2a-2c) are integrally formed, and the upper and lower magnetic metal plates (7, 8) form a closed magnetic circuit via lateral plates (9). The upper magnetic metal plate (7) is formed by a substance having a lower magnetic permeability than pure iron, and/or is formed in a thickness (t) which is thinner than the thickness (T) of the lower magnetic metal plate (8).
Inventors:
CHIKADA, Junji (36-11 Shinbashi 5-chome, Minato-k, Tokyo 77, 〒1058677, JP)
近田 淳二 (〒77 東京都港区新橋５丁目３６番１１号ＦＤＫ株式会社内 Tokyo, 〒1058677, JP)
近田 淳二 (〒77 東京都港区新橋５丁目３６番１１号ＦＤＫ株式会社内 Tokyo, 〒1058677, JP)
Application Number:
JP2011/007194
Publication Date:
July 19, 2012
Filing Date:
December 22, 2011
Export Citation:
Assignee:
FDK CORPORATION (36-11, Shinbashi 5-chome Minato-k, Tokyo 77, 〒1058677, JP)
ＦＤＫ株式会社 (〒77 東京都港区新橋５丁目３６番１１号 Tokyo, 〒1058677, JP)
CHIKADA, Junji (36-11 Shinbashi 5-chome, Minato-k, Tokyo 77, 〒1058677, JP)
ＦＤＫ株式会社 (〒77 東京都港区新橋５丁目３６番１１号 Tokyo, 〒1058677, JP)
CHIKADA, Junji (36-11 Shinbashi 5-chome, Minato-k, Tokyo 77, 〒1058677, JP)
International Classes:
H01P1/36; H01P1/387
Attorney, Agent or Firm:
SHIMIZU, Chiharu (3rd Floor, Nakagin-Honsha Bldg. 16-10, Ginza 8-chome, Chuo-k, Tokyo 61, 〒1040061, JP)
Claims:
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