Telecommunications – Transmitter – Power control – power supply – or bias voltage supply
Reexamination Certificate
2007-11-06
2007-11-06
Vuong, Quochien B. (Department: 2618)
Telecommunications
Transmitter
Power control, power supply, or bias voltage supply
C455S115100, C330S144000
Reexamination Certificate
active
10521990
ABSTRACT:
The present invention relates to a method and an arrangement for optimizing the efficiency of a power amplifier (1) that is utilized for transmission of radio signals in a portable radio communication device, such as a mobile phone. The impedance loading the power amplifier (1) is controlled by a controller (5) in dependence on a transmission power of the portable radio communication device, wherein the radiating impedance of an antenna element (2) loading the power amplifier is controlled in dependence of the desired load impedance. Preferably, the changing of radiating impedance is performed by changing a capacitive coupling between the antenna element and a ground element or by changing the size of the antenna element. Better efficiency and bandwidth are thereby attained.
REFERENCES:
patent: 6061025 (2000-05-01), Jackson et al.
patent: 6349216 (2002-02-01), Alberth et al.
patent: 6538506 (2003-03-01), Hareyama
patent: 6549169 (2003-04-01), Matsuyoshi et al.
patent: 6571087 (2003-05-01), Iwatsuki
patent: 6678506 (2004-01-01), Dolman et al.
patent: 6862432 (2005-03-01), Kim
patent: 2002/0057222 (2002-05-01), McKinzie et al.
patent: 2002/0183013 (2002-12-01), Auckland et al.
patent: 2002/0193088 (2002-12-01), Jung
patent: 2003/0160728 (2003-08-01), Fukushima et al.
patent: 1 093 222 (2001-04-01), None
patent: 1 156 582 (2001-11-01), None
patent: 1 248 362 (2002-10-01), None
AMC Centurion AB
Holland & Hart LLP
Vuong Quochien B.
LandOfFree
Power amplifier efficiency does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Power amplifier efficiency, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Power amplifier efficiency will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3824650