Consecutive doherty amplifier
AssigneeSumitomo Electric Device Innovations, Inc.
InventorsAndrey Grebennikov, James Wong, Naoki Watanabe
Life of this patent
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Abstract
A consecutive Doherty amplifier is disclosed. The Doherty amplifier includes a carrier amplifier, a power splitter, a peak amplifier, and a phase compensator. The carrier amplifier receives a radio frequency signal with interposing any signal splitters. The power splitter splits an output of the carrier amplifier into first and second split signals. The phase compensator transfers the second split signal to the peak amplifier. The first split signal is combined with the output of the peak amplifier.
Claims17
A consecutive Doherty amplifier that outputs an amplified signal by receiving an input radio frequency (RF) signal, the consecutive Doherty amplifier comprising:
- an input terminal that receives the input RF signal thereto;
- a carrier amplifier that receives the input RF signal provided in the input terminal without interposing any signal splitters;
- a power splitter that splits a signal output from the carrier amplifier into a first split signal and a second split signal;
- a peak amplifier that receives the second split signal;
- a transmission line provided between the power splitter and the peak amplifier, the transmission line compensating a phase difference between the first split signal output from the power splitter and a signal output from the peak amplifier;
- and
- another transmission line connecting to a through port of the power splitter;
- wherein the consecutive Doherty amplifier outputs the first split signal when the peak amplifier turns off, and the first split signal combined with the signal output from the peak amplifier when the peak amplifier turns on;
- wherein the power splitter is a directional coupler having the through port that outputs the first split signal, a coupling port that outputs the second split signal, and an isolation port that is terminated to a ground,
- wherein the transmission line and the another transmission line each having a quarter wavelength (λ/4), where λ is a wavelength of the input RF signal, the transmission line being provided in an input of the peak amplifier, the another transmission line being provided in the through port of the power splitter.
A consecutive Doherty amplifier that outputs an amplified signal by receiving an input radio frequency (RF) signal, the consecutive Doherty amplifier comprising:
- an input terminal that receives the input RF signal thereto;
- a carrier amplifier that receives the input RF signal provided in the input terminal without interposing any signal splitters, and that splits a signal output from the carrier amplifier into a first split signal and a second split signal;
- a peak amplifier that receives the second split signal;
- and
- a transmission line provided between the carrier amplifier and the peak amplifier, the transmission line compensating a phase difference between the first split signal output from the carrier amplifier and a signal output from the peak amplifier;
- wherein the consecutive Doherty amplifier outputs the first split signal when the peak amplifier turns off, and the first split signal combined with the signal output from the peak amplifier when the peak amplifier turns on;
- wherein the carrier amplifier includes a plurality of cells each concurrently receiving the input RF signal,
- wherein the cells in a portion thereof outputs the first split signal and in a rest portion thereof outputs the second split signal.
A consecutive Doherty amplifier that outputs an amplified signal by receiving an input radio frequency (RF) signal, the consecutive Doherty amplifier comprising:
- an input terminal that receives the input RF signal thereto;
- a carrier amplifier that receives the input RF signal provided in the input terminal without interposing any signal splitters, and that splits a signal output from the carrier amplifier into a first split signal and a second split signal;
- a peak amplifier includes a first peak amplifier and a second peak amplifier, the first peak amplifier that receives the second split signal and that splits a signal output from the carrier amplifier into a third split signal and a fourth split signal, and the second peak amplifier that receives the fourth split signal;
- and
- a transmission line provided between the carrier amplifier and the first peak amplifier, the transmission line compensating a phase difference between the first split signal output from the carrier amplifier and a signal output from the first peak amplifier;
- wherein the consecutive Doherty amplifier outputs the first split signal when the peak amplifier turns off, and the first split signal combined with the signal output from the peak amplifier when the peak amplifier turns on.
Dependencies are inferred from the claim text.