Irreversible circuit device with small insertion loss and...

Wave transmission lines and networks – Plural channel systems – Nonreciprocal gyromagnetic type

Reexamination Certificate

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C333S024200

Reexamination Certificate

active

06861919

ABSTRACT:
An irreversible circuit device with small insertion loss and excellent isolation is to be provided. An irreversible circuit device according to the invention has a flat plate shaped ferrite member and first, second and third central conductors placed on the ferrite member. In the central conductors, second conductor parts are placed on the ferrite member as input or output first conductor parts are placed on notch parts of the ferrite member. Therefore, when a magnetic flux passes through V-shaped extension parts as a magnetic path, the current generation is reduced and the energy transmission is increased in the first conductor part placed therebetween. Consequently, the insertion loss is reduced, and the isolation becomes excellent.

REFERENCES:
patent: 3341789 (1967-09-01), Goodman et al.
patent: 20020079981 (2002-06-01), Tanaka
patent: 20020171504 (2002-11-01), Takeda et al.
patent: 20030006855 (2003-01-01), Yoneda
patent: 2001-185914 (2001-07-01), None

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