射频标签功率放大设计论文正文.doc

射频标签功率放大器设计 摘要 射频识别即RFID（Radio Frequency IDentification）技术，是一种利用射频通信实现的非接触式自动识别技术，其基本原理是它通过空间耦合(交变磁场或电磁场) 或雷达反射的传输特性，实现无接触信息传递并通过所传递的信息达到识别对象并获取相关数据，识别工作无需人工干预，可工作于各种恶劣环境。RFID技术可识别高速运动物体而且可以同时识别多个标签，操作快速方便。 按照设计要求，本次的电子标签的工作频率为13.56MHz，所使用的电子标签Mifarel为无源标签，并符合ISO 14443标准。由此设计了射频读写电路，微控制单元（MCU）电路，通信接口电路，射频功率放大器电路等。其中的关键部分射频读写模块电路的设计，采用FM1702SL高度集成芯片，内部集成了模拟调制解调电路。而射频功率放大器电路，则采用廉价的MOS场效应管IRF51O，其功能是实现将射频信号的放大。设计一个合理的阻抗匹配网络的来匹配输入/输出信号，确保功率放大器的稳定工作。 [关键词]：射频识别；电子标签；射频功率放大器；FM1702SL；MOS场效应管 Abstract Radio Frequency Identification RFID (Radio Frequency IDentification is) is a radio frequency communication to achieve non-contact automatic identification technology, its basic originally it through space coupling (alternating magnetic field or electromagnetic field) or the transmission characteristics of the radar reflectivity-freecontact information to pass the message to identify objects and access to relevant data, identify the work without human intervention, can work in a variety of harsh environments. RFID technology can identify the high-speed moving objects and cocoa also identify multiple tags, quick and easy to operate. In accordance with the design requirements, the operating frequency of the electronic tag is 13.56MHz, the use of electronic tags Mifarel passive tags, and complies with the ISO 14443 standard. Thus designed RFID reader circuit, the micro control unit (MCU) circuits, communications interface circuits, RF power amplifier circuit. The key part of the radio frequency reader module circuit design, to adopt FM1702SL highly integrated chips, the internal integration of analog modulation and demodulation circuit. RF power amplifier circuit, low-cost MOS FET IRF51O its function is to achieve the amplification of the RF signal. Design a reasonable impedance matching networks to match the input / output signals to ensure the stability of the power amplifier. [Keywords]: RFID; electronic tags; RF power amplifierale ;FM1702SL; MOS field-effect transistor 目录