Systems and methods of RF power transmission, modulation, and amplification, including cartesian 4-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. An apparatus for power transmission, modulation and amplification, comprising:
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means for receiving information, and for generating in-phase and quadrature phase amplitude control signals from said received information;
means for receiving said amplitude control signals and a frequency reference signal, and for generating first, second, third, and fourth substantially constant envelope signals using said frequency reference signal and said amplitude control signals; and
means for simultaneously amplifying and combining said first, second, third, and fourth substantially constant envelope signals to create a desired output signal.
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26. A method of RF power transmission, modulation, and amplification, comprising any embodiment illustrated in
FIGS. 4-6 , 7A, 7B, 8A, 8B, 8C, 19 and 20.
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27. An apparatus of RF power transmission, modulation, and amplification, comprising any embodiment illustrated in
FIGS. 4-6 , 7A, 7B, 8A, 8B, 8C, 19 and 20.
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28. A method of RF power transmission, modulation, and amplification, comprising any embodiment described in Section 3.1.
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29. An apparatus of RF power transmission, modulation, and amplification, comprising any embodiment described in Section 3.1.
Specification