射频卡协议，射频识别，RFID（Radio Frequency Identification）技术，又称无线射频识别，是一种通信技术，可通过无线电讯号识别特定目标并读写相关数据，而无需识别系统与特定目标之间建立机械或光学接触。(Radio frequency identification, RFID (Radio Frequency Identification) technology, also known as radio frequency identification, is a kind of communication technology, through radio signals to identify specific targets and to read and write data, between without recognition system and the specific goal of establishing a mechanical or optical contact.)