Multi-frequency power amplifying device

Abstract

The invention provides a multi-frequency power amplifying device which satisfies the requirements of improving efficiency and linearization. The multi-frequency power amplifying device comprises a first input terminal, a second input terminal, a first adjusting module, a second adjusting module, a first summator and a second summator, wherein the first input terminal receives the signal of frequency f1 and then outputs to a first digital predistortion module, the second input terminal receives the signal of frequency f2 and then outputs to a second digital predistortion module, the first adjusting module adjusts a first signal and outputs the first signal to the first summator, the second adjusting module adjusts a third signal and outputs the third signal to the first summator, the first summator combines the signal adjusted by the second adjusting module and the signal output by the first adjusting module and outputs the combined signals to a first digital-analog converter, and the second summator combines the second signal and the fourth signal and outputs the combined signal to the second digital-analog converter. The multi-frequency power amplifying device improves the design performance of frequency-span amplification, reduces amplification type and reduces cost.

Description

technical field [0001] The invention relates to the field of mobile communication, in particular to a multi-band power amplification device. Background technique [0002] In a wireless communication system, the power amplifier is located at the front end of the transmitter, and its main function is to amplify the signal and meet the system's requirements for the power of the transmitted signal. In order to ensure a certain modulation accuracy and not interfere with other systems, higher requirements are put forward for the linearization technology of the power amplifier. Although related technologies such as power amplifiers have always been research hotspots in the field of communication, the requirements for power amplifiers still revolve around efficiency and linearity, mainly involving various architectures and technologies of the power amplifier itself, as well as algorithms for corresponding linearization techniques, such as , Doherty technology has achieved great suc...

AI Technical Summary

Problems solved by technology

[0004] With the development of communication technology, technologies such as multi-band and ultra-wideband have put forward higher requirements for power amplifiers, resulting in additional figure 1 The amplifier architecture of the example has great difficulty in balancing efficiency and linearity

For example, attach figure 1 The example power amplifier architecture may be able to meet the efficiency and linearity requirements of signal A with frequency band f, but it is difficult to meet the efficiency and linearity requirements of signal B with frequency band f', and vice versa; A and signal B requirements, the efficiency will be very low, which brings great difficulties to the system design

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