Telecommunications – Transmitter and receiver at same station – Radiotelephone equipment detail
Reexamination Certificate
2007-03-20
2007-03-20
Feild, Joseph (Department: 2617)
Telecommunications
Transmitter and receiver at same station
Radiotelephone equipment detail
C455S090300, C455S078000, C455S552100, C455S083000
Reexamination Certificate
active
10023561
ABSTRACT:
A method is disclosed for operating a multi-mode mobile station, wherein each mode shares at least one common band of frequencies. The method includes transmitting a signal from a first antenna circuit of the mobile station in the common band of frequencies and, while transmitting, electronically detuning a second antenna circuit of the mobile station such that the second antenna circuit is not resonant in the common band of frequencies. As an example, the common band of frequencies includes 1900 MHz. The step of detuning includes varying an impedance of at least one component that forms a part of the second antenna circuit, where the at least one component can be a stripline or a PIN diode of a FET diode uses as switch for making an impedance change. The at least one component can also be a normally active component that is put into a passive state. A multi-mode mobile station in accordance with these teachings has, for each mode, a transmitter chain that includes an antenna circuit that operates in the common band of frequencies and a controller, that is responsive to a first one of the transmitter circuits transmitting, for electronically detuning a second antenna circuit of the mobile station such that said second antenna circuit is resonant at a frequency that lies outside of, or that is shifted away from, the common band of frequencies.
REFERENCES:
patent: 5691730 (1997-11-01), Egashira et al.
patent: 5926503 (1999-07-01), Kelton et al.
patent: 6072993 (2000-06-01), Trikha et al.
patent: 6101374 (2000-08-01), Kono
patent: 6175334 (2001-01-01), Vannatta et al.
patent: 6496150 (2002-12-01), Li et al.
patent: 6600931 (2003-07-01), Sutton et al.
patent: 6633748 (2003-10-01), Watanabe et al.
patent: 6657595 (2003-12-01), Phillips et al.
patent: 6920315 (2005-07-01), Wilcox et al.
patent: 2002/0095271 (2002-07-01), Brinsfield
patent: 2002/0183013 (2002-12-01), Auckland et al.
patent: 2003/0001784 (2003-01-01), Li et al.
patent: 2003/0008693 (2003-01-01), Tanaka et al.
patent: 2003/0052824 (2003-03-01), Ollikainen et al.
Feild Joseph
Harrington & Smith PC
Nguyen David Q.
Nokia Corporation
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