RFID (Radio Frequency IDentification)

The abbreviation RFID stands for "Radio Frequency Identification".

 

What is it ?

 

RFID is a technology to store and retrieve data remotely using RFID tags . The read range of the data depends on the type of tags used and extends a few centimeters to several meters.

Unlike reading a barcode which is readable and therefore requires that the barcode is visible, reading data from an RFID tag can be done without the reader needing to "see" the tag, even through thin layers of materials such as paint.

 

RFID tag or label

 

Small label can be reduced to a few millimeters and integrates a microchip that stores data and an antenna that transmits information. An RFID tag can be attached or incorporated into an object.

 

There are two types of tags:

 

The passive tag uses the energy supplied by the radio signal from the transmitter to transmit the data it contains. Its lifetime is virtually unlimited and read range is quite low (less than 5 meters). Providing energy to the RFID tag, the reader will be able to read or write information to the chip.

 

 

The active tag is equipped with an onboard battery which allows it to emit a signal without the reader needed to provide energy by radio waves. It allows as much reading as writing data and is readable at a distance greater than a passive tag. But its lifetime is much shorter, limited by the capacity of the battery.

 

RFID Frequencies

 

 

Each frequency has its own characteristics in terms of communication (transmission distance, transmission speed) and environment (presence of metallic materials, electromagnetic waves). Thus, each frequency has its preferred area of ​​application.

Performance (transmission range of information ) and the cost of an RFID tag depends on the frequency used.

ISO 18000 is a series of standards for the identification of RFID tags.