Reconfigurable high-efficiency high-linearity broadband power amplifying method and amplifier

Abstract

The invention discloses a reconfigurable high-efficiency high-linearity broadband power amplifying method and an amplifier. One output end of an unequal Wilkinson power divider in the amplifier is connected with a carrier power amplifier, and the other output end of the unequal Wilkinson power divider is connected with a peak power amplifier; the carrier power amplifier is connected with one input end of a power combiner through a 1 / 4 wave length impedance transformer; the output end of the peak power amplifier is connected with the other input end of the power combiner; the input end of the power combiner is connected with a load modulation network; the load modulation network is characterized in that a section of 1 / 4 wave length transmission line is connected in parallel to the tail of the conventional 1 / 4 wave length transmission line; and the bandwidth of the conventional Doherty is broadened. According to the amplifying method and the amplifier, drifting of 'effective' load impedance along with operating frequency can be inhibited greatly, so that the broadband of the Doherty amplifier is improved, which provides guarantee for improving the overall broadband of the Doherty amplifier.

Description

technical field [0001] The invention relates to a power amplifier, in particular to a reconfigurable, high-efficiency, high-linear broadband power amplification method and an amplifier. Background technique [0002] The power amplifier, as the final module in the transmitter, is the component with the largest power consumption in the entire radio frequency system. Its main function is to amplify the power of the signal output by the previous stage, and then send the amplified signal to the antenna for transmission. Since the power amplifier consumes a lot of DC power, efficiency is the first important indicator to be considered in the design of the power amplifier. At the same time, output power, linearity, and bandwidth are also key indicators of the power amplifier. This is mainly reflected in the following aspects: (1) The bandwidth of the power amplifier. Since various communication standards are compatible with each other and their respective working frequency bands ar...

AI Technical Summary

Problems solved by technology

At present, the carrier power amplifier and the peak power amplifier in the broadband Doherty power amplifier only consider the matching of the broadband fundamental wave and do not consider the improvement of the efficiency of the harmonic control. The research focus of the broadband Doherty is how to broaden the bandwidth of the power amplifier, especially 1 / 4 wavelength transmission line load modulation network after main and auxiliary power amplifiers

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