基于ARM的功率放大器控制系统设计

doi:10.16180/j.cnki.issn1007-7820.2020.11.009

Abstract

Abstract:

In order to solve the problem of unstable working state of power amplifier in RF link of transmitter, this paper studies the working principle of RF link and designes the control system of power amplifier. This system uses STM32F103ZG chip based on ARM architecture as the main control chip, which can realize the real-time acquisition of the working state of power amplifier through TTL interface. After the working state of the power amplifier is analyzed by the upper computer program, combined with the indicators of the transmitter, the control instructions of the power amplifier are issued, and the working state of the power amplifier is adjusted. The test results show that the system achieves 1 dB compression point-11.8 dBm at the input power of 15.9 dBm. Additionally,the output third-order node is reached at 25.7 dBm, and the input third-order node is -2.7 dBm, which indicates that the design can meet the requirements of the transmitter.

Key words: transmitter, power amplifier, ARM, STM32F103ZG, TTL, upper computer, 1 dB compression point, 3-connected nodes

CLC Number:

TN911.7

WANG Jiwei. Design of Power Amplifier Control System Based on ARM[J].Electronic Science and Technology, 2020, 33(11): 46-48.

Figures/Tables 7

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Table 1

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References 13

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指标名称	指标值
信号带宽	100 MHz
合成带宽	250 MHz
带内纹波	±0.5 dB@250 MHz
三阶节点	25 dBm
边带抑制	65 dB
本振泄漏	-74 dBm

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Design of Power Amplifier Control System Based on ARM

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