Design of precise RF power meter based on MSP430 MCU

YANG Wenlong; CHEN Qiang

doi:10.13873/J.1000-9787(2021)06-0076-03

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Design of precise RF power meter based on MSP430 MCU

更新时间：2025-09-11

- Design of precise RF power meter based on MSP430 MCU
- Issue 6, Pages: 76-78+82(2021)
- 作者机构：
  
  上海工程技术大学电子电气工程学院
- 作者简介：
- 基金信息：
- DOI：10.13873/J.1000-9787(2021)06-0076-03
  CLC： TM933.3;TP368.1
- Published：2021
- 稿件说明：
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YANG Wenlong, CHEN Qiang. Design of precise RF power meter based on MSP430 MCU[J]. 2021, (6): 76-78+82.
DOI：

YANG Wenlong, CHEN Qiang. Design of precise RF power meter based on MSP430 MCU[J]. 2021, (6): 76-78+82. DOI： 10.13873/J.1000-9787(2021)06-0076-03.

摘要

功率计以MSP430F149为主控核心

搭载功率分配器、射频放大器、射频衰减器、射频开关、AD8362真有效值检波芯片和电压跟随器等

实现对功率信号的处理以及采集

采用薄膜晶体管(TFT)触摸屏实现人机交互

测量的数据经过GSM模块统一打包上传到服务器

通过消息队列遥测传输(MQTT)通信协议

可在移动端或者QT上位机读取测量数据以及进行参数的设定。经过实验测试

设计的功率计扩展了测量范围

测量误差较小。在100～3 000 MHz频率范围内

测量信号范围能达到-70～+30 dBm

误差不超过0.5 dBm。

Abstract

MSP430 F149 is used as main control core and power distributor

RF amplifier

RF attenuator

RF switch

AD8362 true effective value detection chip

and voltage follower as auxiliary facilities

power signal is processed and collected.Thin film transistor（TFT）touch screen is used to realize man-machine interaction.The measured data are packaged and uploaded to the server by GSM module.Through message queuing telemetry transport（MQTT）communication protocol

mobile terminal or QT upper computer can read measured data and set parameters.After testing

in the range of 100～3 000 MHz

signal of-70～+30 dBm can be measured

and the error is no more than 0.5 dBm.

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