RFID tags Flashcards
1
Q
Principles of Operation
A
1 Reader transmits encoded radio signal to interrogate tag
2. Tag receive message and responds with identifier and any additional data
3 reader communicate with database to store and evaluate data
2
Q
What does RFID allow?
A
Allows wireless transmission over radio waves using transponder and receiver
3
Q
Each tag has …..
A
Each tag has an identifier and stored data in a non volatile memory cell
4
Q
Passive RFID
A
No power supply ( powered by radio energy by reader )
Up to 1 meter range
5
Q
Active RFID
A
Small battery
Transmits identifier at regular intervals
Depending on battery, up to 200 meter range
Typically used in retail
