基于Si4463的无线信号质量检测仪的设计

摘要

无线网络主要以空气作为传输介质,依靠电磁波和红外线等作为载体来传输所需要的数据.无线网络虽然灵活、方便,但复杂的物理与电磁环境会对其产生较大的影响.研究了由于多路径效应、信号衰减以及其他无线电波信号干扰所造成的无线信号不稳定现象,设计并制作了一款基于Si4463的无线信号质量检测仪.该无线信号质量检测仪可方便、快捷地分析现场环境中的无线信号强度.其主要包括微控制器单元(MCU)、接收机、供电和串口4部分.无线信号强度主要由接收信号强度指示(RSSI)来反映.详细介绍了各部分的设计电路,并通过罗德与施瓦茨公司的SMB100A信号发生器验证了该无线信号质量检测仪的准确度.该检测仪可用于复杂工业现场中的电磁环境预测与评估,具有一定的可靠性,并对便携式仪器仪表的研究与设计具有良好的示范作用.%Wireless network is mainly with air as the transmission medium and relies on electromagnetic waves and infrared as carrier to transfer required data. Although wireless network is flexible and convenient,the complexity of physical and electromagnetic environment may have a greater impact on it.The study on the unstable phenomenon of wireless signals caused by multipath effect,signal attenuation and other radio interference is carried out;and a wireless signal quality detector based on Si4463 is designed and developed,which can dectect the wireless signal strength of field environment quickly and easily.The detector mainly includes the microcontrol unit (MCU),the receiver,the power supply and serial ports.The strength of wireless signal is mainly reflected by the received signal strength indication(RSSI).The details of each circuit part of this design are introduced.The correctness of this detector is verified through the signal generator SMB100A of Rohde&Schwarz.The study can be used to predict and evaluate the electromagnetic environment under complex industrial sites;and achieves a certain degree of reliability.It also has a good demonstration in research and design of portable instrumentation.