Variable-frequency band-elimination filter

Details Variable-frequency band-elimination filter Variable-frequency band-elimination filter

2011-03-22

2011-03-22

Lee, Benny (Department: 2817)

Wave transmission lines and networks

Coupling networks

Frequency domain filters utilizing only lumped parameters

C333S176000

Reexamination Certificate

active

07911294

ABSTRACT:
A series resonance circuit defined by a series circuit including an inductor and a capacitor and a series resonance circuit defined by a series circuit including an inductor and a capacitor are connected in shunt to a signal line. A diode is disposed between the grounding end of the series resonance circuit and the ground, and a diode is disposed between the grounding end of the series resonance circuit and the ground. The connection point between the grounding end of the series resonance circuit and the diode is connected to the ground via a frequency shifting inductor in a conductive state at high frequency, and the connection point between the grounding end of the series resonance circuit and the diode is connected to the ground via a frequency shifting inductor in a conductive state at high frequency. A matching circuit defined by a multistage T-shape LCL circuit is disposed between the series resonance circuits.

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Official communication issued in the International Application No. PCT/JP2008/052517, mailed on May 20, 2008.

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