‘Radio Frequency Identification’ (RFID) tag

‘Radio Frequency Identification’ (RFID) tag

Recently ‘Radio Frequency Identification (RFID)’ tag is being used to track Amarnath pilgrims. Its use has been taken in view of the increase in security threats during the pilgrimage.

Radio Frequency Identification (RFID)

  • ‘Radio Frequency Identification’ is a ‘wireless tracking system’ composed of a ‘tag’ and a ‘reader’.
  • In this, radio waves are used to communicate the information and identity of objects or people.
  • Encrypted information, serial numbers and brief descriptions can be entered in the ‘tags’ used in this.

There are two types – passive and active RFID tags:

  • Active RFIDs use their own power source, mostly batteries.
  • Passive RFIDs are activated using ‘electromagnetic energy’ transmission through the reader.

How does it work –

  • RFID tags serve as ‘readers’ using radio waves at many different frequencies – low frequency, high frequency (HF) and ultra-high frequency (UHF) – Use an integrated circuit and antenna to communicate with.
  • The message sent back by the ‘tag’ in the form of ‘radio waves’ is translated into data and analyzed by the host computer system.
  • Unlike barcodes, RFID does not require ‘direct vision’ to identify objects.

Source – The Hindu

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