What Is RFID? How Tags, Readers and Data Work
What Is RFID? How Tags, Readers and Data Work
RFID uses radio waves to identify tagged objects without requiring the same line-of-sight process as a printed barcode.
RFID system components
A complete system includes a tag or transponder, a reader, one or more antennas, software that filters read events, and a business application that uses the data.
Passive and active tags
Passive tags draw operating energy from the reader field. Active tags use a battery and may support longer range or sensors, but cost and maintenance are higher.
Common frequency families
LF, HF and UHF systems behave differently. Frequency affects coupling, range, antenna size, data rate and performance near materials.
What RFID can do
RFID is useful for identification, counting, locating within defined zones, access, authentication and process evidence. It is not automatically precise real-time location.
How to start
Define the business event first, choose representative objects, set accuracy thresholds and run a controlled pilot before full procurement.