基于MSP430单片机的精密射频功率计设计  

Design of precise RF power meter based on MSP430 MCU

作　　者：杨文龙 陈强[1] YANG Wenlong;CHEN Qiang(School of Electronic and Electrical Engineering,Shanghai University of Engineering Science,Shanghai 201620,China)

机构地区：[1]上海工程技术大学电子电气工程学院,上海201620

出　　处：《传感器与微系统》2021年第6期76-78,82,共4页Transducer and Microsystem Technologies

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。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.

关 键 词：射频功率计 消息队列遥测传输(MQTT)协议 人机交互 

分 类 号：TN98[电子电信—信息与通信工程]