Systems and methods of RF power transmission, modulation, and amplification, including multiple input single output (MISO) amplifier embodiments comprising harmonic control circuitry
First Claim
1. An apparatus for power transmission, modulation, and amplification, comprising:
- a transfer function module;
modulation circuitry coupled to said transfer function module;
a power amplification stage coupled to said modulation circuitry;
wherein said power amplification stage comprises a plurality of power amplifiers having outputs that are coupled to form an output of said apparatus; and
harmonic control circuitry;
wherein said harmonic control circuitry comprises a plurality of harmonic control circuit networks coupled to inputs of said power amplifiers, wherein said harmonic control circuit networks enable a staggered-bias of said power amplifiers and operate to increase real power transfer to a fundamental frequency of said output and to decrease real power transfer to harmonic frequencies of said output.
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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
28 Claims
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1. An apparatus for power transmission, modulation, and amplification, comprising:
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a transfer function module; modulation circuitry coupled to said transfer function module; a power amplification stage coupled to said modulation circuitry;
wherein said power amplification stage comprises a plurality of power amplifiers having outputs that are coupled to form an output of said apparatus; andharmonic control circuitry;
wherein said harmonic control circuitry comprises a plurality of harmonic control circuit networks coupled to inputs of said power amplifiers, wherein said harmonic control circuit networks enable a staggered-bias of said power amplifiers and operate to increase real power transfer to a fundamental frequency of said output and to decrease real power transfer to harmonic frequencies of said output. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A method for at least one of power transmission, modulation, and amplification, comprising:
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receiving a frequency reference signal; receiving information; generating a plurality of control signals using at least said received information; generating a plurality of substantially constant envelope signals using at least said frequency reference signal and said control signals; amplifying and combining said substantially constant envelope signals using a plurality of power amplifiers to create an output signal; and biasing said plurality of power amplifiers at respective bias points so as to cause a staggered bias of said power amplifiers, wherein said staggered bias of said power amplifiers increases real power transfer to a fundamental frequency of said output signal and decreases real power transfer to harmonic frequencies of said output signal. - View Dependent Claims (20, 21, 22, 23, 24, 25, 26, 27, 28)
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Specification