RF Power Amplifier with Combined Baseband, Fundamental and Harmonic Tuning Network

An amplifier circuit, comprising:

• a first port, a second port, and a reference potential port;
• an RF amplifier device comprising a first terminal electrically coupled to the first port, a second terminal electrically coupled to the second port, and a reference potential terminal electrically coupled to the reference potential terminal, the RF amplifier device being configured to amplify an RF signal as between the first and second terminals across an RF frequency range that includes a fundamental RF frequency;
• and
• an impedance matching network electrically coupled to the first terminal of the RF amplifier and the first port, wherein the impedance matching network comprises:
• a baseband termination circuit having reactive components with electrical parameters that are tailored such that the baseband termination circuit presents low impedance in a baseband frequency region that is below the RF frequency range;
• a fundamental frequency matching circuit having reactive components with electrical parameters that are tailored such that the fundamental frequency matching circuit presents a complex conjugate of an intrinsic impedance of the RF amplifier device in the RF frequency range;
• and
• a second order harmonic termination circuit having reactive components with electrical parameters that are tailored such that the second order harmonic termination circuit presents low impedance at second order harmonics of frequencies in the fundamental RF frequency range.