Radio frequency power amplification device

An amplifying device, a technology of radio frequency power, applied in power amplifiers, high frequency amplifiers, improving amplifiers to reduce nonlinear distortion, etc. , the effect of reducing power consumption and simplifying overhead

Inactive Publication Date: 2012-11-28
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Problems solved by technology

[0006] The technical problem to be solved by the present invention is: to overcome the shortcomings of existing high-efficiency radio frequency power amplifiers, such as large distortion and low linearity, and

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Embodiment Construction

[0023] In order to make the purpose and technical solutions of the embodiments of the present invention more clear, hereinafter, the technical solutions in the embodiments of the present invention will be clearly and completely described with reference to the drawings of the embodiments of the present invention.

[0024] The invention relates to a high-efficiency power amplifier module and a linearization method thereof. Implementation of high efficiency power amplifier units, modulation schemes used in wireless systems (e.g. Orthogonal Frequency Division Multiple Access (OFDM), or Quadrature Amplitude Modulation (QAM) for Code Division Multiple Access (CDMA)) will generate 7-13dB The Power Peak-to-Average Ratio (PAPR) of an RF signal. Power amplifiers are generally designed to achieve the highest efficiency near their maximum power. The structure of a driving stage amplifier 200 and an improved Doherty power amplifier 300 involved in the present invention can well solve this...

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Abstract

The invention provides a radio frequency power amplification device, which comprises a digital control circuit, a driver stage amplifier and a Doherty power amplifier, wherein the digital control circuit consists of a coupler, a signal power detection circuit and a grid voltage control circuit; and the digital control circuit adjusts the grid voltage of main power amplifiers in the driver stage amplifier and the Doherty power amplifier according to the signal power, so that the amplifier system has the optimal linearity. A signal amplification module consists of the driver stage amplifier and the Doherty power amplifier, wherein the driver stage amplifier is biased in AB classes and guarantees high linearity and gain; and the Doherty power amplifier guarantees high efficiency of the system. The radio frequency power amplification device is a high-efficiency high-linearity radio frequency power amplifier and is applied to a wireless communication transmitter.

Description

technical field [0001] The invention belongs to the field of wireless communication, and in particular relates to a high-efficiency and high-linearity radio frequency power amplification device used in a mobile communication base station. Background technique [0002] RF power amplifier is a key component in wireless communication base station system, its performance will directly affect the cost, performance, volume, stability and other indicators of communication products. The efficiency and linearity of RF power amplifiers are two indicators that scholars have studied most in recent years. With the popularity of the green radio concept, various communication operators plan to reduce the total power consumption by 50%-60% in the next ten years. According to Ericsson's research data, energy costs account for half of mobile operators' operating expenses, while base stations account for 60% of the total energy consumption of mobile telecommunications networks, and the energy...

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Application Information

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IPC IPC(8): H03F1/32H03F3/20H03F3/189
CPCY02B60/50
Inventor 何松柏丁炫谢树义侯宪允吕亚博游飞
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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