Power amplifier, power distributor, and power combiner

Details Power amplifier, power distributor, and power combiner Power amplifier, power distributor, and power combiner

2005-12-27

2005-12-27

Nguyen, Patricia (Department: 2817)

Amplifiers

With semiconductor amplifying device

Including distributed parameter-type coupling

C330S295000, C330S12400D, C333S136000

Reexamination Certificate

active

06980057

ABSTRACT:
In a power amplifier of the present invention, distributed constant lines105aand105bhave a total line length corresponding to a ½ wavelength of a fundamental wave so as to invert the phase of a fundamental wave component of a first signal amplified by a first amplification element102a. A series resonant circuit106is connected a tone end between the distributed constant lines105aand105b, which invert the phase of a second-order harmonic component, so as to be in parallel connection with the distributed constant lines105aand105b. Further, the series resonant circuit106is connected at the other end to an output side of the second amplification element102b. The series resonant circuit106resonates with a second-order harmonic frequency, thereby canceling out the second-order harmonic component.

REFERENCES:
patent: 5274341 (1993-12-01), Sekine et al.
patent: 6201445 (2001-03-01), Morimoto et al.
patent: 6275118 (2001-08-01), Saito et al.
patent: 6529051 (2003-03-01), Tokumitsu et al.
patent: 6798305 (2004-09-01), Aikawa et al.
patent: 5-029851 (1993-02-01), None

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