Power amplifier
AssigneeCity University of Hong Kong
InventorsWing Shing Chan, Xin Yu Zhou, Shi Chang Chen, Wen Jie Feng
Life of this patent
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Abstract
A power amplifier including: a main power amplification device having an output; an auxiliary power amplification device having an output; a load modulation circuit operably connected to the output of the main power amplification device and the output of the auxiliary power amplification device; and a post-matching circuit operably connected to load modulation circuit. The load modulation circuit is arranged to enable fundamental frequency load modulation and to enable modulated harmonic terminations of at least the second and third harmonic frequencies. The modulated harmonic terminations may include drain terminations.
Claims24
A power amplifier, comprising:
- a main power amplification device having an output;
- an auxiliary power amplification device having an output;
- a load modulation circuit operably connected to the output of the main power amplification device and the output of the auxiliary power amplification device, the load modulation circuit comprising
- a first harmonic-modulated impedance inverter operably connected with the output of the main power amplification device;
- a second harmonic-modulated impedance inverter operably connected with the output of the auxiliary power amplification device;
- and
- a phase compensation circuit operably connected between the first and second harmonic-modulated impedance inverters;
- and
- a post-matching circuit operably connected to load modulation circuit;
- wherein the load modulation circuit is arranged to enable fundamental frequency load modulation and to enable modulated harmonic terminations of at least second and third harmonic frequencies;
- and
- wherein each of the first and second harmonic-modulated impedance inverters include:
- a first transmission line;
- a second transmission line;
- a coupled line arranged to provide an electric coupling and operably connected between the first and second transmission lines;
- and
- a grounded capacitor arrangement operably connected with the coupled line.
A power amplifier, comprising:
- a main power amplification device having an output;
- an auxiliary power amplification device having an output;
- a load modulation circuit operably connected to the output of the main power amplification device and the output of the auxiliary power amplification device;
- and
- a post-matching circuit operably connected to load modulation circuit;
- wherein the load modulation circuit is arranged to enable fundamental frequency load modulation and to enable modulated harmonic terminations of at least second and third harmonic frequencies;
- and
- wherein the load modulation circuit comprises:
- a first harmonic-modulated impedance inverter operably connected with the output of the main power amplification device;
- a second harmonic-modulated impedance inverter operably connected with the output of the auxiliary power amplification device;
- and
- a phase compensation circuit operably and directly connected between the first and second harmonic-modulated impedance inverters.
Dependencies are inferred from the claim text.