Passive RFID
Passive RFID
Passive RFID Technology

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Passive RFID Information

Some advantages of a passive RFID tag are:

  • It functions without a battery; passive RFID tags can have a useful life of twenty years or more.
  • It is typically much less expensive to manufacture passive RFID tags.
  • It can be much smaller than active RFID tags.
  • Passive tags are lighter and are less expensive then the more powerful active tags.
Some disadvantages of a passive RFID tag are:
  • The tag can be read only at short distances, from a few inches to several feet at most. This limits the device for certain applications.
  • It may not be possible to integrate with sensors that use electricity for power.
  • The tag remains readable, even after the item to which the tag is attached is no longer being tracked.
  • Requires a higher-powered reader than active RFID tags
  • The orientation of a passive RFID tag must be just right or the reader won't locate it.
  • Passive tags also have difficulty sending data through liquids or metal.

Uses of passive RFID tags:

  • Apparel
  • Consumer goods
  • Asset tracking
  • Ticketing
  • Vehicle identification
  • Inventory control
  • Access control
  • Entry pass, toll pass
  • Electronic toll collection at toll booths
  • Rapid Transit - buses, ferries, trains and subway
  • Library book or bookstore tracking
  • ID Badges
  • Case, pallet, and shipping container tracking
  • Supply chain management
  • Work-in-process tracking
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