High-frequency amplifier module and high-frequency amplifier module unit

A high-frequency amplifier module, comprising:

• a silicon substrate;
• a gallium arsenide substrate;
• a driver-stage amplifier that includes a plurality of amplifiers arranged in multi-stages and amplifies a signal input from an input terminal;
• a final-stage amplifier that further amplifies the amplified signal amplified by the driver-stage amplifier and outputs the further amplified signal to an output terminal;
• a bypass path with an end being connected to an input side of the driver-stage amplifier and another end being connected to an output side of the final-stage amplifier;
• and
• a bypass amplifier that is arranged in the bypass path, wherein
• the driver-stage amplifier is fabricated on the silicon substrate, and the final-stage amplifier is fabricated on the gallium arsenide substrate, and
• at least part of the bypass amplifier is fabricated on the silicon substrate.