RFID（ Radio Frequency IDentification ) 即射频识别技术，是一种可通过无线传输识别特定目标并读写相关数据的技术。标签主要由存有识别代码的芯片和收发天线组成。 内部集成电路通过接受到RFID读取器发出的电磁波进行驱动。当标签接收到足够强度的讯号时，可以向读取器发出数据。由于读取器可以在同时远距离读取单个或多个标签。故此，在使用上比传统条码标签，更能节省时间和人力。

RFID technology is an automatic identification method which can be used conveniently for product tracking. A passive UHF RFID tag uaually includes an antenna and a RF chip which has a memory to store identification data.A UHF RFID system typically consists of transponders and transceivers such as tag and reader. Usually,there is no power source inside the passive RFID tag, so the voltage needed to power RFID COMS chip is obtained via remote activation.