Wave transmission lines and networks – Coupling networks – Nonreciprocal gyromagnetic type
Reexamination Certificate
2005-03-01
2005-03-01
Lee, Benny (Department: 2817)
Wave transmission lines and networks
Coupling networks
Nonreciprocal gyromagnetic type
C333S001100
Reexamination Certificate
active
06861922
ABSTRACT:
Three mutually intersecting central conductors are positioned on ferrite to which a direct current magnetic field is applied, the port portions of two of the central conductors are branched and one branched portion of each is extended and bent so as to form an inductor. These inductors and capacitors with one end connected to a ground terminal make up series resonant circuits. The resonance frequencies of the series resonant circuits are set to approximately two times and approximately three times that of the center frequency of the pass band of the device which is the fundamental frequency, thereby causing attenuation of the second harmonic frequency and third harmonic frequency of the fundamental frequency, thus acting as matching capacitance of the fundamental frequency. Accordingly, a small nonreciprocal circuit device having a great amount of attenuation of a particular frequency is obtained without increasing costs, a nonreciprocal circuit device, and a communication device using the same, are provided.
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Krauss et al., “Solid State Radio Engineering”, John Wiley & Sons, Inc., 1980, New York NY, p. 39.
Jones Stephen E.
Keating & Bennett LLP
Lee Benny
Murata Manufacturing Co. Ltd.
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