Radio frequency identification
RFID (Radio Frequency Identification) is a method for collecting data using radio waves to exchange information between RFID tags and RFID readers. A direct line of sight is not required, in contrast to bar code. RFID readers are able to read from and write to hundreds of tags simultaneously.
An RFID tag is a chip tagged to a specific crate, pallet or tray which has to be identified, tracked and traced. This can be a one-time paper tag or a durable one made of vandal-proof material, permanently attached and intended for long-term use.
There are passive and active RFID tags. A passive tag can be activated by a reader also supplying it with the energy for sending and receiving. An active tag has its own independent energy source and can send and receive intermittently or continuously over long distances.
The second component of an RFID system is the RFID antenna. This functions as the ears of the system, receiving the radio signal from the RFID tag and relaying it to the RFID reader, the system’s brain.
RFID antennae come in all shapes and sizes, depending on their intended use. CaptureTech has the capacity to design RFID antennae in-house for specific applications, in order to guarantee optimal reading performance.
The third component of an RFID system is the RFID reader. It uses radio waves to read from or write to an RFID tag. An RFID reader can be ‘frequency agile’, meaning multiple frequencies may be used at the same time.