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US 11,070,174 B2Granted
Quadrature combined doherty amplifiers
AssigneeSkyworks Solutions, Inc.
InventorsAleksey A. Lyalin, Philip John Lehtola, Bo Pan, Weimin Sun
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Abstract
Apparatus and methods for quadrature combined Doherty amplifiers are provided herein. In certain embodiments, a separator is used to separate a radio frequency (RF) input signal into a plurality of input signal components that are amplified by a pair of Doherty amplifiers operating in quadrature. Additionally, a combiner is used to combine a plurality of output signal components generated by the pair of Doherty amplifiers, thereby generating an RF output signal exhibiting quadrature balancing.
Claims20
A radio frequency system comprising:
- a separator configured to separate a radio frequency input signal into a first separated signal component and a second separated signal component, to separate the first separated signal component into a first pair of input signal components, and to separate the second separated signal component into a second pair of input signal components having a quadrature phase relationship with respect to the first pair of input signal components;
- a first Doherty amplifier configured to generate a first pair of amplified signal components based on amplifying the first pair of radio frequency input signal components;
- a second Doherty amplifier configured to generate a second pair of amplified signal components based on amplifying the second pair of input signal components;
- and
- a combiner configured to generate a radio frequency output signal based the first pair of amplified signal components and the second pair of amplified signal components, the combiner including first and second conductive coils at least partially overlaid with respect to one another to provide inductive coupling.
2 more elements
A radio frequency system comprising:
- a separator configured to separate a radio frequency input signal into a first separated signal component and a second separated signal component, to separate the first separated signal component into a first pair of input signal components, and to separate the second separated signal component into a second pair of input signal components having a quadrature phase relationship with respect to the first pair of input signal components;
- a first Doherty amplifier configured to generate a first pair of amplified signal components based on amplifying the first pair of radio frequency input signal components;
- a second Doherty amplifier configured to generate a second pair of amplified signal components based on amplifying the second pair of input signal components;
- and
- a combiner configured to generate a radio frequency output signal based the first pair of amplified signal components and the second pair of amplified signal components, the combiner including first quarter wavelength transmission line sections operable to generate a first signal based on the first pair of amplified signal components, second quarter wavelength transmission line sections operable to generate a second signal based on the second pair of amplified signal components, and the combiner is further configured to generate a radio frequency output signal based on the first signal and the second signal.
2 more elements
A method of radio frequency signal amplification, the method comprising:
- using separator to separate a radio frequency input signal into first and second separated signal components, separate the first separated signal component into a first pair of input signal components, and separate the second separated signal component into a second pair of input signals components;
- amplifying the first pair of input signal components to generate a first pair of amplified signal components using a first Doherty amplifier;
- amplifying the second pair of input signal components to generate a second pair of amplified signal components using a second Doherty amplifier;
- and
- generating a radio frequency output signal based on the first pair of amplified signal components and the second pair of amplified signal components, the generating including using a combiner that includes first and second conductive coils at least partially overlaid with respect to one another.
2 more elements
A mobile device comprising:
- a transceiver configured to generate a radio frequency input signal;
- and
- a power amplifier system configured to amplify the radio frequency input signal to generate a radio frequency output signal, the power amplifier system configured to separate the radio frequency input signal into a first separated signal component and a second separated signal component, to separate the first separated signal component into a first pair of input signal components, and to separate the second separated signal component into a second pair of input signal components having a quadrature phase relationship with respect to the first pair of input signal components, the power amplifier system including a first Doherty amplifier configured to generate a first pair of amplified signal components based on amplifying the first pair of input signal components, and a second Doherty amplifier configured to generate a second pair of amplified signal components based on amplifying the second pair of input signal components, and the power amplifier system further including a combiner configured to generate the radio frequency output signal based on the first pair of amplified signal components and the second pair of amplified signal components, the combiner including first and second conductive coils at least partially overlaid with respect to one another to provide inductive coupling.
A method of radio frequency signal amplification, the method comprising:
- using separator to separate a radio frequency input signal into first and second separated signal components, separate the first separated signal component into a first pair of input signal components, and separate the second separated signal component into a second pair of input signals components;
- amplifying the first pair of input signal components to generate a first pair of amplified signal components using a first Doherty amplifier;
- amplifying the second pair of input signal components to generate a second pair of amplified signal components using a second Doherty amplifier;
- with first quarter wavelength transmission line sections, generating a first signal based on the first pair of amplified signal components;
- with second quarter wavelength transmission line sections, generating a second signal based on the second pair of amplified signal components;
- and
- generating a radio frequency output signal based on the first signal and the second signal.
4 more elements
Dependencies are inferred from the claim text.