Radio Frequency Identification

  • Formal
  • Radio Frequency Identification (FRID) is the wireless use of electromagnetic fields to identify and track tags attached to objects. Generally speaking, this is the use of strong radio waves to “excite” enough current in a small tag to send a radio transmission back.
  • Practical
  • Generally speaking, this is the use of strong radio waves to “excite” enough current in a small tag to send a radio transmission back. It works over short range and only for small amounts of data. The RFID device serves the same purpose as a bar code or a magnetic strip on the back of a credit card or ATM card; it provides a unique identifier for that object. And, just as a bar code or magnetic strip must be scanned to get the information, the RFID device must be scanned to retrieve the identifying information.

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