Patent ID: 8736364

Claim:
A power amplifier for amplifying and outputting an input signal, wherein: the power amplifier includes first and second amplifiers which are cascaded; a Doherty amplifier is used in circuit configuration of each of the first and second amplifiers; and the first amplifier has a different power ratio from a power ratio of the second amplifier, and wherein: the first amplifier includes a first carrier amplifier having a saturation output level of X 1 and a first peak amplifier having a saturation output level of Y 1 ; the second amplifier includes a second carrier amplifier having a saturation output level of X 2 and a second peak amplifier having a saturation output level of Y 2 ; and (X 1 /Y 1 )≠(X 2 /Y 2 ) when the power ratio of the first amplifier is denoted by (X 1 /Y 1 ) and the power ratio of the second amplifier is denoted by (X 2 /Y 2 ).