Broadband harmonic matching network

An impedance matching circuit, comprising:

• a network of reactive components that are configured to match a characteristic impedance of an amplifier device to a fixed impedance value across an RF frequency range that includes a fundamental RF frequency,
• wherein the network of reactive components comprises a high-pass impedance transformer, a phase shifter and a broadband impedance transformer connected in series with one another between an input port and an output port of the impedance matching circuit,
• wherein parameters of the broadband impedance transformer are such that the broadband impedance transformer transmits an RF signal in the RF frequency range while providing impedance matching in the RF frequency range,
• wherein parameters of the phase shifter are such that higher order harmonics of the RF signal are phase shifted while the RF signal in the RF frequency is transmitted with matched impedance, and
• wherein parameters of the high-pass impedance transformer are such that high-pass impedance transformer matches an impedance of the RF signal in the RF frequency range while transmitting with low reflection RF signals that are in a second order harmonic frequency range that overlaps with a second order harmonic of the fundamental RF frequency.