电子标签的做法(RFID labelling practices) The electronic tag is made in three steps. That is surface printing (like printing ofhods are as follows: according to frequency division, RFID card is divided into high frequency, medium frequency and low-frequency system. The high frequency system applied to longer reading distance and high speed of reading and writing situations, such as train monitoring, highway toll system, but the antenna beam is narrow the price is higher: if system in the range of 13. 56MHz, the frequency of application for access control and need to transfer large amounts of data; the low frequency system for application of short distance and low most of the cost, such as access control, animal regulation, cargo tracking. Divided by read and write, the RFID card is divided into three types: RO (read and write card), RW and WORM. The RO card has a unique number that cannot be changed. Divide by energy source. RFID card is divided into two kinds of active and passive. Active electric energy, his identification card use long distance card, up to a few meters, but its life is limited and the price is high: the electromagnetic energy of the coupled passive card reader launched as your own energy, RFID card receiving RF pulse rectifier and charging to the capacitor, capacitor voltage after voltage as the working voltage. Divided by behavior, RFID card is divided into active
