Power amplifier, power distributor, and power combiner

摘要

In a power amplifier of the present invention, distributed constant lines 105a and 105b have 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 element 102a. A series resonant circuit 106 is connected a tone end between the distributed constant lines 105a and 105b, which invert the phase of a second-order harmonic component, so as to be in parallel connection with the distributed constant lines 105a and 105b. Further, the series resonant circuit 106 is connected at the other end to an output side of the second amplification element 102b. The series resonant circuit 106 resonates with a second-order harmonic frequency, thereby canceling out the second-order harmonic component.