Doherty amplifying apparatus using a harmonic control circuit
First Claim
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1. A Doherty power amplifying apparatus, comprising:
- a harmonic-controlled Doherty amplifier; and
an input matching unit and an output matching unit for input matching and output matching the harmonic-controlled Doherty amplifier, respectively,wherein the harmonic-controlled Doherty amplifier includes;
a carrier amplifier;
a peaking amplifier arranged in parallel to the carrier amplifier; and
a harmonic control circuit, arranged in front of the output matching unit, for controlling a harmonic component of an output of the Doherty amplifier to enable the Doherty amplifier to perform a switching or saturation operation.
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Abstract
A Doherty power amplifying apparatus includes a harmonic-controlled Doherty amplifier; and an input matching unit and an output matching unit for input matching and output matching the harmonic-controlled Doherty amplifier, respectively. The harmonic-controlled Doherty amplifier includes a carrier amplifier; a peaking amplifier arranged in parallel to the carrier amplifier; and a harmonic control circuit, arranged in front of the output matching unit, for controlling a harmonic component of an output of the Doherty amplifier to enable the Doherty amplifier to perform a switching or saturation operation.
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Citations
13 Claims
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1. A Doherty power amplifying apparatus, comprising:
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a harmonic-controlled Doherty amplifier; and an input matching unit and an output matching unit for input matching and output matching the harmonic-controlled Doherty amplifier, respectively, wherein the harmonic-controlled Doherty amplifier includes; a carrier amplifier; a peaking amplifier arranged in parallel to the carrier amplifier; and a harmonic control circuit, arranged in front of the output matching unit, for controlling a harmonic component of an output of the Doherty amplifier to enable the Doherty amplifier to perform a switching or saturation operation. - View Dependent Claims (2, 3, 4, 5, 6, 7, 10, 11, 12)
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8. A Doherty power amplifier, comprising:
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a carrier amplifier and a plurality of peaking amplifiers, each of the carrier amplifier and the peaking amplifiers includes an input matching unit and an output matching unit; a N-way power divider for applying a same input power to the carrier amplifier and the peaking amplifiers; an offset line, connected to each of the output matching units of the carrier amplifier and the peaking amplifiers, for controlling a load impedance output when the peaking amplifiers are not operating; a first quarter-wave transmission line serving as an impedance inverter for converting an impedance output provided by the offset line into a ¼
wavelength to enable a Doherty amplification;a second quarter-wave transmission line for converting an impedance output provided by the offset line into a ¼
wavelength to set a load impedance of the Doherty amplifier; anda harmonic control circuit for controlling a harmonic component in an output of the carrier amplifier and the peaking amplifiers to enable the Doherty amplifier to perform a switching or saturation operation. - View Dependent Claims (13)
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9. A Doherty power amplifier, comprising:
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a carrier amplifier and a plurality of peaking amplifiers, each of the carrier amplifier and the peaking amplifiers includes an input matching unit and an output matching unit; a N-stage power divider for applying a same input power to the carrier amplifier and the peaking amplifiers; an offset line, connected to each of the output matching units of the carrier amplifier and the peaking amplifiers, for controlling a load impedance output when the peaking amplifiers are not operating; a first quarter-wave transmission line serving as an impedance inverter for converting an impedance output provided by the offset line into a ¼
wavelength to enable a Doherty amplification;a second quarter-wave transmission line for converting an impedance output provided by the offset line into a ¼
wavelength to set a load impedance of the Doherty amplifier; anda harmonic control circuit for controlling a harmonic component in an output of the carrier amplifier and the peaking amplifiers to enable the Doherty amplifier to perform a switching or saturation operation.
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Specification