Contactless but in contact
RFID lets items talkTechnically ingenious and with egregious potential
Radio frequency identification systems (RFID) mainly consist of two system units. The core is the transponder. This is a medium with fixed or programmable memory contents. Antennas and data interpretation components take signals from the transponder, analyse them and send them to a superior control system.
According to the frequency range there are three systems. Inductive system (125 KHz and 13,56 MHz), UHF system ( 868 MHZ and 915 MHz) and Microwave system (2,45GHz). The energy needed for communication of passive transponder with antenna is supplied when transponder is in reach of antenna. That means the transponder needs no endogenous energy source. Active transponders have a battery with energy for several years.
The advantage of RFID over forerunner identification systems like bar code technology is contactless communication. The RFID transponder needs neither physical nor optical contact with a scanner. That quickens processes and creates savings.
- Transponders are robust
- integration in thin objects
- possibility of updating data during process
- multiple usage
- secure identification of objects
- simultaneous reading of several transponders
- longer life, since no mechanical load