Systems and methods of RF power transmission, modulation, and amplification, including direct cartesian 2-branch embodiments
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Abstract
Methods and systems for vector combining power amplification are disclosed herein. In one embodiment, a plurality of signals are individually amplified, then summed to form a desired time-varying complex envelope signal. Phase and/or frequency characteristics of one or more of the signals are controlled to provide the desired phase, frequency, and/or amplitude characteristics of the desired time-varying complex envelope signal. In another embodiment, a time-varying complex envelope signal is decomposed into a plurality of constant envelope constituent signals. The constituent signals are amplified equally or substantially equally, and then summed to construct an amplified version of the original time-varying envelope signal. Embodiments also perform frequency up-conversion.
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Citations
29 Claims
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1-24. -24. (canceled)
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25. A method of power amplification, comprising:
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receiving information;
receiving a frequency reference signal in accordance with a desired output signal frequency;
generating first and second substantially constant envelope signals using said received information and said frequency reference signal;
providing said first and second substantially constant envelope signals to a MISO (multiple input single output) amplifier, wherein said first and second substantially constant envelope signals are amplified and combined to create a desired output signal of said MISO amplifier at said single circuit node.
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26. A method of RF power transmission, modulation, and amplification, comprising any embodiment illustrated in
FIGS. 14, 15 , 15A, 16, 17, 17A, 17B, 18, 18A, 23 and 24.
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27. An apparatus of RF power transmission, modulation, and amplification, comprising any embodiment illustrated in
FIGS. 14, 15 , 15A, 16, 17, 17A, 17B, 18, 18A, 23 and 24.
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28. A method of RF power transmission, modulation, and amplification, comprising any embodiment described in Section 3.3.
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29. An apparatus of RF power transmission, modulation, and amplification, comprising any embodiment described in Section 3.3.
Specification