Telecommunications – Receiver or analog modulated signal frequency converter – Signal selection based on frequency
Reexamination Certificate
2005-02-17
2009-08-18
Urban, Edward (Department: 2618)
Telecommunications
Receiver or analog modulated signal frequency converter
Signal selection based on frequency
C455S248100, C455S125000
Reexamination Certificate
active
07577411
ABSTRACT:
Wireless communication device tuning an antenna matching circuit responsive to a receive signal quality indicator and, optionally, responsive to a failed access probe is provided. Systems and methods are provided that increase the antenna efficiency in either the transmit frequency or the receive frequency in an idle or access state as needed, based on fading conditions, non-ideal antenna efficiency balance, mobile station forward versus reverse link usage and system forward versus reverse link usage. The antenna efficiency may be changed incrementally or may be optimized completely for the transmit frequency or the receive frequency. The re-balancing is accomplished by tuning the antenna matching circuit. One way to tune the antenna matching circuit is to apply a voltage to a ferro-electric capacitor in the matching circuit, thereby changing the capacitance of the ferro-electric capacitor, thereby changing the impedance of the matching circuit.
REFERENCES:
patent: 5103459 (1992-04-01), Gilhousen et al.
patent: 5982759 (1999-11-01), Jo et al.
patent: 6052566 (2000-04-01), Abramsky et al.
patent: 6064868 (2000-05-01), Kobayashi
patent: 6070075 (2000-05-01), Kim
patent: 6144650 (2000-11-01), Watanabe et al.
patent: 6188906 (2001-02-01), Lim et al.
patent: 6198441 (2001-03-01), Okabe et al.
patent: 6298051 (2001-10-01), Odenwalder et al.
patent: 6492942 (2002-12-01), Kezys
patent: 6657595 (2003-12-01), Phillips et al.
patent: 6710651 (2004-03-01), Forrester
patent: 6714526 (2004-03-01), Wei et al.
patent: 6741861 (2004-05-01), Bender et al.
patent: 6754251 (2004-06-01), Sriram et al.
patent: 6785249 (2004-08-01), Soliman
patent: 6788685 (2004-09-01), Holtzman et al.
patent: 6862432 (2005-03-01), Kim
patent: 6993297 (2006-01-01), Smith, Jr.
patent: 7047046 (2006-05-01), Hoffmann et al.
patent: 7058400 (2006-06-01), Brooks
patent: 2004/0009754 (2004-01-01), Smith, Jr.
patent: 2004/0252724 (2004-12-01), Jou
patent: 2005/0007291 (2005-01-01), Fabrega et al.
patent: 2001-011282 (2001-02-01), None
Chang Henry
Fabrega-Sanchez Jorge
Poilasne Gregory
Hannon Christian A
Kyocera Corporation
Urban Edward
LandOfFree
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