High-frequency power amplifier circuit and electronic part for communication

A high frequency power amplifier circuit, comprising:

• an amplifier which comprises a power amplifying FET having a first gate terminal and a second gate terminal, said power amplifying FET being adapted to have a linear operation or saturation operation depending on a bias voltage applied to the first gate terminal;
• and
• a bias control circuit which provides the first gate terminal of said power amplifying FET with such a first bias voltage in a first operation mode that said amplifier operates in the saturation region, and such a second bias voltage in a second operation mode that said amplifier has a linear operation, and provides the second gate terminal with a third bias voltage which suppresses the gain of said power amplifying FET,
• wherein said third bias voltage is higher than said first bias voltage and said second bias voltage.