Power amplifier

A power amplifier comprising:

• a first differential amplification unit comprising a 11th gain amplification unit that amplifies a gain of an input positive power signal, a 11th wideband filter that feeds back a signal in a band of 8 to 16 GHz from the positive power signal to the 11th gain amplification unit, a 12nd gain amplification unit that amplifies a gain of an input negative power signal, and a 12nd wideband filter that feeds back a signal in a band of 8 to 16 GHz from the negative power signal to the 12nd gain amplification unit;
• a transmission unit that transmits the positive power signal amplified by the 11th gain amplification unit and the negative power signal amplified by the 12nd gain amplification unit to a subsequent stage;
• a second differential amplification unit comprising a 21st power amplification unit that amplifies power of the amplified positive power signal, a 21st wideband filter that feeds back a signal in a band of 8 to 16 GHz from the positive power signal to the 21st power amplification unit, a 22nd power amplification unit that amplifies power of the amplified negative power signal, and a 22nd wideband filter that feeds back a signal in a band of 8 to 16 GHz from the negative power signal to the 22nd power amplification unit;
• and
• an output unit that integrates a positive power signal amplified by the 21st power amplification unit and a negative power signal amplified by the 22nd power amplification unit into one to output.