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Short-wave high-linearity balance structure power amplifier

A power amplifier and balanced structure technology, applied in high frequency amplifiers, amplifiers, differential amplifiers, etc., can solve problems such as adjacent channel interference, widening of output spectrum, signal amplitude and phase distortion, etc., achieve high gain flatness, and improve stability performance, the effect of wide frequency characteristics

Inactive Publication Date: 2017-04-26
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The nonlinearity of the power amplifier will distort the signal amplitude and phase, which will cause the output spectrum to widen and also cause strong interference to adjacent channels

Method used

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  • Short-wave high-linearity balance structure power amplifier
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  • Short-wave high-linearity balance structure power amplifier

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Embodiment Construction

[0019] The present invention will be further described in detail below in conjunction with the drawings and embodiments, but the present invention is not limited to this embodiment.

[0020] In this embodiment, a short-wave high linearity balanced structure power amplifier is provided, and its structural block diagram is as follows: figure 1 As shown, including input and output baluns, two completely symmetrical single-channel cascode and directional coupler negative feedback amplifier modules, adjustable bias network part; RF input signal is coupled to the phase difference of the two channels through the input balun 180° balanced signal, each signal passes through a cascode circuit composed of two silicon NPN transistors MRF555 and introduces the negative feedback of the directional coupler structure, and then couples to a single signal output through the output balun.

[0021] The specific circuit such as figure 2 As shown, the first balun T1 divides the input RF signal into two ...

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Abstract

The invention relates to the technical field of short-wave wireless communication and provides a short-wave high-linearity balance structure power amplifier. The short-wave high-linearity balance structure power amplifier comprises an input Balun, two same amplification circuit modules, an adjustable DC bias circuit module and an output Balun, wherein radio frequency input signals are coupled to two balance signals having a phase difference of 180 degrees through the input Balun, the two balance signals are respectively input to the two amplification circuit modules, output signals of the two amplification circuit modules are coupled to single-signal output through the output Balun, and the adjustable DC bias circuit module is used for providing DC bias for the two amplification circuit modules; each amplification circuit modules comprises an amplification circuit and a negative feedback circuit, each amplification circuit is composed of two transistors through cascading by use of a common-emitter and common-base mode, each negative feedback circuit is composed of a directional coupler, and the negative feedback circuits are connected with the input ends and the output ends of the amplification circuits. The power amplifier employs a balance structure, is simple in structure and also has the advantages of high linearity and high output power.

Description

Technical field [0001] The present invention relates to the technical field of short-wave wireless communication, in particular to the structure and principle of a short-wave high linear balanced structure power amplifier. Background technique [0002] From Moore’s invention of the telegraph in the 1830s to the introduction of CDMA, 3G, and 4G wireless communications, wireless communications have become an important part of people’s daily lives; with the rapid growth of wireless users and the development of communications services, the communication frequency bands have become more and more frequent. Crowded, spectrum resources are already very scarce, a large number of technologies and services currently use spectrum below 2GHz, which makes the phenomenon of spectrum crowding extremely serious. [0003] Limited spectrum resources are the cornerstone for all wireless communications to survive, and it is very necessary to continuously improve spectrum utilization efficiency in today...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03F1/32H03F3/19H03F3/45
CPCH03F1/3211H03F3/19H03F3/4508H03F2200/451
Inventor 石玉郑华溢刘汉子张玮
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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