Radio frequency power amplifier

A radio frequency power amplifier which selects one path from paths according to a required output power and uses the selected path, each of the paths amplifying a signal, said radio frequency power amplifier comprising:

• an input terminal to which a radio frequency signal is applied;
• a first transistor, which amplifies the radio frequency signal applied to said input terminal;
• a second transistor, which amplifies the radio frequency signal applied to said input terminal;
• a first impedance conversion circuit connected to an output node of said second transistor;
• a first switch element connected to an output node of said first impedance conversion circuit;
• a second impedance conversion circuit;
• and
• a harmonic suppression circuit,
• wherein said output node of said first switch element is connected to said second impedance conversion circuit via said harmonic suppression circuit, and
• an output node of said first transistor is connected to said second impedance conversion circuit not via said harmonic suppression circuit.