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Feedforward power amplifier with predistortion power amplifier

A power amplifier and predistortion technology, applied in power amplifiers, improving amplifiers to reduce nonlinear distortion, etc., can solve problems such as unable to achieve the best effect, can not be effectively solved, signal distortion, etc., to achieve convenient and flexible operation and use, Solve the effect of signal distortion and stable performance

Inactive Publication Date: 2012-02-15
李青
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AI Technical Summary

Problems solved by technology

[0002] At present, radio frequency power amplifiers are widely used in various wireless communication transmission equipment, but the problem of signal distortion cannot be effectively solved. The predistortion technology, general feedforward technology and negative feedback technology used by people have their own advantages and disadvantages. pros and cons, less than optimal

Method used

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  • Feedforward power amplifier with predistortion power amplifier
  • Feedforward power amplifier with predistortion power amplifier
  • Feedforward power amplifier with predistortion power amplifier

Examples

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Embodiment Construction

[0011] Hereinafter, the present invention will be further described in detail with the best embodiment in conjunction with the accompanying drawings;

[0012] The invention includes a housing (1) and a circuit board (2). One side of the housing (1) is provided with a radio frequency output terminal (3), a radio frequency input terminal (4), a monitoring input terminal (5) and a power input terminal (6). ), a plurality of isolation bins (7) are arranged at the inner bottom of the housing (1), and a circuit board (2) is built-in.

[0013] The feedforward amplifier mainly includes 2 amplifiers (main amplifier and error amplifier), directional coupler, delay line and loop control network. The directional coupler is used for power distribution and synthesis, the delay line ensures that the feedforward amplifier can work stably in a wider frequency band, and the loop control network is used to ensure the correct cancellation of the signal and distortion.

[0014] The working principle of ...

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Abstract

The invention relates to a feedforward power amplifier with a predistortion power amplifier. The signal predistortion problem of the existing radio frequency power amplifier cannot be effectively solved. The feedforward power amplifier comprises a shell and a circuit board; a radio frequency output end, a radio frequency input, a monitoring input end and a power supply input end are arranged out of the shell; and the circuit board is arranged in the shell; the feedforward amplifier comprises a main amplifier and an error amplifier, a positioning coupler, a delay wire and a loop control network; the predistortion power amplifying system comprises an analog predistortion or digital predistortion; the analog predistortion way can be realized by SC1887 and diodes of the Scintera company, and the digital predistortion way is realized by the chip schemes of companies such as XILINX, OPTICHRON, NETLOGIC, TI, ADI and the like. The positioning coupler is used for allocation and synthesizing of the power; the delay wire ensures that the feedforward amplifier can work in a wide frequency band stably; and the loop control network ensures the correct offset of the signal and the distortion, thus, the feedforward power amplifier is applied to all of the communication systems.

Description

Technical field [0001] The invention relates to wireless communication transmitting equipment, in particular to a feedforward power amplifier with predistortion power amplifier. Background technique [0002] At present, RF power amplifiers are widely used in various wireless communication transmission equipment, but the problem of signal distortion cannot be effectively solved. The predistortion technology, general feedforward technology and negative feedback technology used by people have their own Pros and cons, the best results cannot be achieved. Summary of the invention [0003] The purpose of the present invention is to provide a feedforward power amplifier with predistortion power amplifier. [0004] The invention includes a casing and a circuit board. One side of the casing is provided with a radio frequency output end, a radio frequency input end, a monitoring input end and a power input end. The inner bottom of the casing is provided with several isolation bins with built...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03F1/32H03F3/20
Inventor 李青
Owner 李青
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