Class-F power amplifier circuit

A class-F amplifier comprising a pair of class-F amplifiers, each of the class-F amplifiers comprising:

• an amplifying element configured to output an output signal including a component of an angular frequency ωo of an input signal, and harmonic components thereof;
• a first reactance circuit interconnecting an output terminal and a ground terminal of the amplifying element;
• a fundamental matching circuit disposed at an output terminal end of the amplifying element;
• a second reactance circuit connected between an input terminal of the fundamental matching circuit and the output terminal of the amplifying element;
• and
• a load interconnecting an output terminal of the fundamental matching circuit and a ground terminal, wherein
• the amplifying element has as an output impedance thereof an impedance of a parallel circuit comprising an output resistor and an output capacitor,
• the first reactance circuit is configured to be open for a dc component, shorted for components of angular frequencies 2ωo, 4o, . . . , 2nωo, where n is an arbitrary integer of 1 or more, and parallel resonant with the output capacitor of the amplifying element for components of angular frequencies 3ωo, 5ωo, . . . , (2n+1)ωo, and
• the second reactance circuit is configured to be shorted for a dc component, and open for components of angular frequencies 3ωo, 5ωo, . . . , (2n+1)ωo,
• wherein the pair of class-F amplifiers are mutually phase-reversed for a push-pull operation for power synthesis by a balun.

A class-F amplifier comprising a pair of class-F amplifiers, each of the class-F amplifiers comprising:

• an amplifying element configured to output an output signal including a component of an angular frequency ωo of an input signal, and harmonic components thereof;
• a first reactance circuit interconnecting an output terminal and a ground terminal of the amplifying element;
• a fundamental matching circuit disposed at an output terminal end of the amplifying element;
• a second reactance circuit connected between an input terminal of the fundamental matching circuit and the output terminal of the amplifying element;
• and
• a load interconnecting an output terminal of the fundamental matching circuit and a ground terminal, wherein
• the amplifying element has as an output impedance thereof an impedance of a parallel circuit comprising an output resistor and an output capacitor,
• the first reactance circuit is configured to be open for a dc component, shorted for components of angular frequencies 2ωo, 4ωo, . . . , 2nωo, where n is an arbitrary integer of 1 or more, and parallel resonant with the output capacitor of the amplifying element for components of angular frequencies 3ωo, 5ωo, . . . ,(2n+1)ωo, and
• the second reactance circuit is configured to be shorted for a dc component, and open for components of angular frequencies 3ωo, 5ωo, . . . , (2n+1)ωo,
• wherein the pair of class-F amplifiers are mutually phase-reversed for a push-pull operation for power synthesis by a balun , and include fundamental matching circuits having ground terminals floated from a ground and connected to each other.