Radio frequency tags are physical carriers of the product electronic code (EPC) that are attached to traceable items and can be globally circulated and recognized and read and written. RFID (Radio, Frequency, Identification) technology, as the key technology to build "Internet of things", has attracted people's attention in recent years. RFID technology originated in Britain and was used in the Second World War to distinguish enemy aircraft from commercial aircraft in 1960s. RFID technology is an automatic identification technology, the United States Department of defense regulations after January 1, 2005, all supplies are to use RFID tags; the U.S. Food and Drug Administration (FDA) recommended manufacturers since 2006 by RFID tracking often false drug. Walmart, Metro, retail applications, RFID technology and a series of actions, but also to promote the RFID in the world's application boom. In 2000, the price of each RFID tag was $1. Many researchers believe that RFID tags are expensive and can be widely applied only if costs are reduced. In 2005, the price of each RFID tag was around 12 cents, and now the price of UHF RFID is around 10 cents. RFID to large-scale applications, on the one hand is to reduce the price of RFID tags, on the other hand, after the application of RFID, can bring value-added services. Statistics show that the EU statistics office, 2010, the EU has led the application of RFID technology application in 3%, distribution of credentials and access control, supply chain and inventory tracking, auto charging, security, production control, asset management.
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