N-way Doherty distributed power amplifier
First Claim
1. An N-way Doherty distributed amplifier comprising:
- an RF input,at least one main distributed amplifier,at least two peaking distributed amplifiers,hybrid coupler responsive to an input signal for providing input to the at least one main distributed amplifier and the at least two peaking distributed amplifiers, respectively, andphase synchronizer responsive to the RF input for synchronizing the phase between the at least one main distributed amplifier and the at least two peaking distributed amplifiers.
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Abstract
A power amplifier using N-way Doherty structure for extending the efficiency region over the high peak-to-average power ratio of the multiplexing modulated signals such as wideband code division multiple access and orthogonal frequency division multiplexing is disclosed. In an embodiment, the present invention uses a dual-feed distributed structure to an N-way Doherty amplifier to improve the isolation between at least one main amplifier and at least one peaking amplifier and, and also to improve both gain and efficiency performance at high output back-off power. Hybrid couplers can be used at either or both of the input and output. In at least some implementations, circuit space is also conserved due to the integration of amplification, power splitting and combining.
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Citations
17 Claims
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1. An N-way Doherty distributed amplifier comprising:
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an RF input, at least one main distributed amplifier, at least two peaking distributed amplifiers, hybrid coupler responsive to an input signal for providing input to the at least one main distributed amplifier and the at least two peaking distributed amplifiers, respectively, and phase synchronizer responsive to the RF input for synchronizing the phase between the at least one main distributed amplifier and the at least two peaking distributed amplifiers. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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Specification