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Understanding RFID Technology Radio-frequency identification (RFID) is a wireless technology that uses electromagnetic fields to automatically identify and track tags attached to objects. An RFID system consists of different components: an RFID reader (or interrogator) and RFID tags. The reader emits radio waves and receives signals back from the tags, which contain information about the objects. Types of RFID Tags/Labels RFID tags can be broadly categorized into two main types: passive and act …