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Power amplifier

A technology of power amplifiers and amplifiers, which is applied in the direction of power amplifiers, amplifiers, amplifier types, etc., and can solve problems such as low efficiency and large volume of power amplifiers

Inactive Publication Date: 2017-05-31
AUCTUS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The present invention provides a power amplifier to solve the problems of large volume and low efficiency of existing power amplifiers

Method used

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no. 1 example

[0022] figure 1 The structural schematic diagram of the power amplifier provided for the first embodiment of the present invention is represented by figure 1 It can be seen that in this embodiment, the power amplifier provided by the present invention includes: a transmitting circuit and a receiving circuit, and the transmitting circuit includes a radio frequency input connector 11, a first-stage amplifier 12, a pre-distortion circuit 13, and a second-stage amplifier 14 connected in sequence , the third-stage amplifier 15, the fourth-stage amplifier 16, the coupler 17, the circulator 18 and the radio frequency output connector 19, the pre-distortion circuit includes an analog pre-distortion chip, which is used to carry out analog pre-distortion processing on the communication data, and the fourth stage The amplifier adopts a Doherty amplifier, and uses a quarter-wavelength composite line to output to the coupler, which is used to amplify the power of the communication signal. ...

no. 2 example

[0035] The power amplifier of 4G small base station is not as demanding as the public network due to the adjacent channel suppression, but it is difficult to meet the requirements only through fallback, and the power consumption must be small. In addition, if the fallback technology is used, the product size is relatively large , is not suitable for the current miniaturization requirements, so for power amplifiers, it will be a challenging problem to adopt appropriate linearization technology and select appropriate amplifier tubes at all levels. However, if digital predistortion is used, the whole system will become complicated and the cost will be high. Therefore, the selected power amplifier must not only meet the design requirements of adjacent channel suppression, but also meet the requirements of low power consumption and miniaturization. It will be a difficult design and development process to select appropriate levels of tubes, adopt appropriate linearization technology,...

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Abstract

The invention provides a power amplifier. The power amplifier comprises a transmitting circuit and a receiving circuit; the transmitting circuit includes a radio-frequency input connector, a first stage amplifier, a pre-distortion circuit, a second stage amplifier, a third stage amplifier, a fourth stage amplifier, a coupler, a circulator and a radio-frequency output connector which are connected in sequence; the pre-distortion circuit includes an analog pre-distortion chip and is used for performing analog pre-distortion processing on communication data; a Doherty amplifier is adopted by the fourth stage amplifier; and the fourth stage amplifier outputs to the coupler by employing a quarter-wave synthetic wire, and is used for amplifying power of a communication signal. According to the power amplifier provided by the invention, the analog pre-distortion chip is adopted, so the requirement on adjacent channel suppression is met; a Doherty circuit structure is adopted by the fourth stage amplifier, so the requirement on efficiency is met, and the requirement on system miniaturization is met; and therefore, the problems of relatively large volume and relatively low efficiency of the existing power amplifier can be solved.

Description

technical field [0001] The invention relates to the field of wireless communication, in particular to a power amplifier. Background technique [0002] At present, some communication equipment, such as power amplifiers of 4G small base stations, are not as demanding as the public network due to adjacent channel suppression, but it is difficult to meet the requirements only through fallback, and the power consumption must be kept small. In addition, if fallback technology is used , The volume of the product is also relatively large, which is not suitable for the current miniaturization requirements. Contents of the invention [0003] The invention provides a power amplifier to solve the problems of large volume and low efficiency of the existing power amplifiers. [0004] The invention provides a power amplifier, including: a transmitting circuit and a receiving circuit, the transmitting circuit includes a radio frequency input connector connected in sequence, a first-stage...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B1/04H03F1/02H03F1/32H03F3/19H03F3/21H03F3/24
CPCH04B1/04H03F1/0288H03F1/3241H03F3/19H03F3/21H03F3/24H03F2200/451H04B2001/0408H04B2001/0425
Inventor 刘德复
Owner AUCTUS TECH CO LTD
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