Communications: radio wave antennas – Antennas – With coupling network or impedance in the leadin
Reexamination Certificate
2008-09-05
2010-10-12
Phan, Tho G (Department: 2821)
Communications: radio wave antennas
Antennas
With coupling network or impedance in the leadin
C343S850000
Reexamination Certificate
active
07812781
ABSTRACT:
A battery portion (BAT) or another type of voltage shift portion is provided for shifting a control voltage (V2) in a direction which causes the anode potential of a variable-capacitance diode (VD) to be a negative potential and superimposes its battery voltage (Vb) on the control voltage (V2). Specifically, the battery portion (BAT) is inserted in a direction which causes the control voltage (V2) to be decreased and operates such that [control voltage (V2)−battery voltage (Vb)] is applied to the anode terminal of the variable-capacitance diode (VD). Then, the voltage applied to the variable-capacitance diode (VD) is [control voltage (V2)−control voltage (V1)−battery voltage (Vb)]. Thus, the variable capacitance range of the variable-capacitance diode (VD) is increased.
REFERENCES:
patent: 2773121 (1956-12-01), Janssen
patent: 2775714 (1956-12-01), Curtis
patent: 3095533 (1963-06-01), Keizer
patent: 5557290 (1996-09-01), Watanabe
patent: 6049310 (2000-04-01), Sadahiro
patent: 6862432 (2005-03-01), Kim
patent: 6940467 (2005-09-01), Fischer et al.
patent: 2006/0022763 (2006-02-01), Kato
patent: 2009/0245425 (2009-10-01), Tsutsui et al.
patent: 63-176011 (1988-07-01), None
patent: 1-240009 (1989-09-01), None
patent: 7-303019 (1995-11-01), None
patent: 8-051380 (1996-02-01), None
patent: 11-17580 (1999-01-01), None
patent: 2000-151281 (2000-05-01), None
patent: 10-336055 (2008-12-01), None
patent: 2005020427 (2005-03-01), None
International Search Report issued Jul. 24, 2007 with English Language translation.
English Language translation of Written Opinion issued Jul. 24, 2007.
Keating & Bennett LLP
Murata Manufacturing Co. Ltd.
Phan Tho G
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