Wave transmission lines and networks – Plural channel systems – Nonreciprocal gyromagnetic type
Reexamination Certificate
2008-01-28
2008-10-07
Jones, Stephen E (Department: 2817)
Wave transmission lines and networks
Plural channel systems
Nonreciprocal gyromagnetic type
C333S024200
Reexamination Certificate
active
07432777
ABSTRACT:
An isolator includes five center electrodes coupled at radio frequencies to a ferrite member to which a DC bias magnetic field is applied from a permanent magnet. First and third electrodes do not intersect each other. The first and third electrodes intersect the second, fourth and fifth electrodes with electrical insulation therebetween. Connection is established so that a magnetic field generated when current flows from one end to the other end of the first electrode and a magnetic field generated when current flows from one end to the other end of the third electrode are in phase and in the same direction. Connection is established so that a magnetic field generated when current flows from one end to the other end of the second electrode, a magnetic field generated when current flows from one end to the other end of the fourth electrode, and a magnetic field generated when current flows from one end to the other end of the fifth electrode are in phase and in the same direction. The one end of the first electrode and the other end of the third electrode define balanced input ports, and the one end of the fourth electrode defines an unbalanced output port.
REFERENCES:
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Official communication issued in the International Application No. PCT/JP2006/312782, mailed on Aug. 1, 2006.
Kawanami; “Non-Reciprocal Circuit Element, Composite Electronic Component, and Communication Apparatus”; U.S. Appl. No. 12/020,723, filed Jan. 28, 2008.
Jones Stephen E
Keating & Bennett LLP
Murata Manufacturing Co. Ltd
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