Wave transmission lines and networks – Coupling networks – Nonreciprocal gyromagnetic type
Reexamination Certificate
2010-04-13
2010-12-28
Jones, Stephen E (Department: 2817)
Wave transmission lines and networks
Coupling networks
Nonreciprocal gyromagnetic type
C333S001100
Reexamination Certificate
active
07859358
ABSTRACT:
A nonreciprocal circuit device has a structure that allows a direct current magnetic field having an even density to be applied to a necessary portion of a ferrite without impairing a reduction in profile so as to improve insertion loss. The nonreciprocal circuit device, for example, a two-port isolator, includes permanent magnets, a ferrite to which a direct current magnetic field is applied by the permanent magnets, and a first center electrode and a second center electrode that are disposed on the ferrite. The permanent magnets are disposed so as to oppose principal surfaces of the ferrite. Portions of each of the permanent magnets opposing relay electrodes on top and bottom surfaces are preferably thicker than other portions thereof.
REFERENCES:
patent: 2009/0003944 (2009-01-01), Omori et al.
patent: 63-081403 (1988-05-01), None
patent: 10-004301 (1998-01-01), None
patent: 2007-306149 (2007-11-01), None
patent: 2007/046299 (2007-04-01), None
Official Communication issued in International Patent Application No. PCT/JP2008/066045, mailed on Dec. 16, 2008.
Hasegawa Takashi
Kitamori Nobumasa
Jones Stephen E
Keating & Bennett LLP
Murata Manufacturing Co. Ltd.
LandOfFree
Non-reciprocal circuit device does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Non-reciprocal circuit device, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Non-reciprocal circuit device will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4179640