Two-port isolator and communication apparatus

Details Two-port isolator and communication apparatus Two-port isolator and communication apparatus

2007-08-07

2007-08-07

Jones, Stephen E. (Department: 2817)

Wave transmission lines and networks

Coupling networks

Nonreciprocal gyromagnetic type

C333S001100

Reexamination Certificate

active

11551774

ABSTRACT:
A two-port isolator includes a first center electrode and a second center electrode which are wound around a ferrite to which a direct-current magnetic field is applied from permanent magnets, and the ferrite is mounted on a circuit board having built-in matching circuit devices. The ferrite is preferably substantially rectangular-parallelepiped-shaped having first and second principal surfaces that are substantially parallel to each other, and the long-side length of the principal surfaces is about 1.5 to about 5 times the short-side length. The second center electrode is wound between one and four turns around the ferrite.

REFERENCES:
patent: 2002/0014927 (2002-02-01), Makino et al.
patent: 2004/0207479 (2004-10-01), Hasegawa
patent: 2002-026615 (2002-01-01), None
patent: 2004-015430 (2004-01-01), None
patent: 2004-088743 (2004-03-01), None
International Search Report issued in the corresponding International Application No. PCT/JP2005/013162, mailed on Aug. 30, 2005.

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