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US 7,030,714 B2Granted
Method and apparatus to match output impedance of combined outphasing power amplifiers
AssigneeIntel Corporation
InventorVictor Korol
Life of this patent
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Abstract
Briefly, an apparatus having a first capacitor-inductor-capacitor impedance converter operably coupled to a second capacitor-inductor-capacitor impedance converter. The first and second capacitor-inductor-capacitor impedance converter may combine a first and second signals of first and second outphasing power amplifiers and may provide a matched output impedance to a desired load.
Claims26
An apparatus comprising:
- a first active component coupled to a first capacitor of a first capacitor-inductor-capacitor impedance converter, to filter out a second harmonic of a first signal;
- and
- a second active component coupled to a first capacitor of a second capacitor-inductor-capacitor impedance converter, to filter out a second harmonic of a second signal,
- wherein the first and second capacitor-inductor-capacitor impedance converters are coupled by a shared capacitor to combine said first and second signals inputted to the first and second active components, respectively.
1 more element
A communication device comprising:
- a dipole antenna operably coupled to an outphasing transmitter, which comprises first and second non linear power amplifiers;
- and
- a combiner to combine first and second signals provided by the first and second non linear power amplifiers of the outphasing transmitter, wherein the combiner includes a first active component coupled to a first capacitor of a first capacitor-indicator-capacitor impedance converter, to filter out a second harmonic of a first signal of the first non linear power amplifier, and a second active component coupled to a first capacitor of a second capacitor-inductor-capacitor impedance converter, to filter out a second harmonic of the second signal of the second non linear power amplifier.
A method comprising:
- providing impedance matching between a combination of first and second power amplifiers and a desired load by assigning first and second capacitance values to first and second capacitors, respectively, associated with said combination;
- and
- filtering out a second harmonic of first and second signals provided by the first and second power amplifiers, respectively.
A wireless communication device comprising:
- an outphasing transmitter, which comprises first and second non linear power amplifiers to output first and second signals, respectively;
- and
- a combiner able to combine said first and second signals of first and second non linear power amplifiers, respectively, wherein the combiner includes a first active component coupled to a first capacitor of a first capacitor-inductor-capacitor impedance converter, to filter out a second harmonic of the first signal of the first non linear power amplifier, and a second active component coupled to a first capacitor of a second capacitor-inductor-capacitor impedance converter, to filter out a second harmonic of a second signal of the second non linear power amplifier.
A wireless communication system comprising:
- a station having an outphasing transmitter comprises first and second non linear power amplifiers coupled to a combiner having a first active component coupled to a first capacitor of a first capacitor-inductor-capacitor impedance converter, to filter out a second harmonic of a first signal of the first non linear power amplifier, and a second active component coupled to a first capacitor of a second capacitor-inductor-capacitor impedance converter, to filter out a second harmonic of a second signal of the second non linear power amplifier, wherein the first and second capacitor-indicator-capacitor impedance converters are able to combine said first and second signals of first and second non linear power amplifiers, respectively.
Dependencies are inferred from the claim text.