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Radio frequency identification (RFID) technology, also known as radio frequency identification, is a communication technology that can identify a specific target without establishing mechanical or optical contact between the identification system and the specific target, and read and write related data through radio signals. Radio frequency, generally microwave, 1- 100GHz, is suitable for short-distance identification communication.
Radio frequency tag is the physical carrier of product electronic code (EPC), which is attached to traceable items and can be circulated around the world for identification, reading and writing. Rfid (Radio Frequency Identification) technology, as a key technology to build the "Internet of Things", has attracted people's attention in recent years. RFID technology originated in Britain and was used to identify enemy planes in World War II. It was commercialized in the 1960s.
Radio frequency identification technology is used in many industries. By labeling the cars produced, the factory can easily track the progress of the cars on the production line. The warehouse can track the location of drugs. Radio frequency tags can also be attached to livestock and pets to facilitate the positive identification of livestock and pets (positive identification refers to preventing several livestock from using the same identity).