Enhanced doherty amplifier

Abstract

The disclosure relates to an enhanced Doherty amplifier that provides significant performance improvements over conventional Doherty amplifiers. The enhanced Doherty amplifier includes a power splitter, combining node, a carrier path, and a peaking path. The power splitter is configured to receive an input signal and split the input signal into a carrier signal provided at a carrier splitter output and a peaking signal provided at a peaking splitter output. The carrier path includes carrier power amplifier circuitry, a carrier input network coupled between the carrier splitter output and the carrier power amplifier circuitry, and a carrier output network coupled between the carrier power amplifier circuitry and the Doherty combining node.; The peaking path includes peaking power amplifier circuitry, a peaking input network coupled between the peaking splitter output and the peaking power amplifier circuitry, and a carrier output network coupled between the power amplifier circuitry and the Doherty combining node.

Description

technical field [0001] The present disclosure relates to power amplifiers, and in particular to Doherty amplifiers capable of efficiently operating over a wider bandwidth than conventional Doherty amplifiers. Background technique [0002] As current mobile communication systems evolve and new communication systems are developed, there is a constant need for more powerful and efficient power amplifiers capable of operating over a wider frequency range. Many of these communication systems employ battery powered mobile devices and access points, such as base stations. For such communication devices, more efficient power amplifiers provide longer operating times between battery charges. [0003] Furthermore, transmit power levels for mobile devices, and especially access points, continue to increase, while the size of these devices is shrinking. As the power level increases, the heat generated during amplification generally increases. Accordingly, designers are faced with dis...

AI Technical Summary

Problems solved by technology

Therefore, for devices that need to support multiple communication bands, a single Doherty amplifier is not enough

[0007] For communication equipment supporting multiple standards on different communication bands, designers often employ multiple power amplifier chains for each of the different communication bands, which increases the size, cost, and complexity of the communication equipment

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