Radio frequency identification (RFID) is a non-contact automatic identification technology. Its basic principle is to realize the automatic identification of the identified object by using the transmission characteristics of RF signal and spatial coupling (inductive or electromagnetic coupling) or radar reflection. RFID reader (RFID reader) communicates wirelessly with RFID electronic tag through antenna, which can read or write tag identification code and memory data.
1. Low frequency RFID handset. Low frequency RFID handset supports RFID reading and writing in 125k ~ 134.2k frequency band. 2. High frequency RFID handset. The supported frequency band is 13.56MHz, and the standard card of yx9183a high-frequency handset can read 20cm. 3. Handheld RFID.
According to RFID Magazine, Walmart USA has informed its suppliers that it is required to expand RFID tags into some new categories of goods, and as of September this year, these newly expanded goods will be mandatory to embed smart tags with RFID capabilities to be allowed to be listed in Walmart stores. It is reported that the newly expanded areas include: consumer electronics (such as TVs, xboxes)