Radio Frequency IDentification – RFID

RFID stands for Radio Frequency Identification, a contactless technology based on electromagnetic fields. It supports low frequency (125/134.2 kHz), high frequency (13.56 MHz), and ultra-high frequency (300 MHz to 3 GHz) radio waves for data transmission. It consists of an information carrier (RFID tag or RFID card, also called a transponder) and a reading device (RFID reader or RFID scanner). When one of the elements comes within range of the other, they can communicate. There are also two types of RFID tags: passive and active. The latter actively broadcast signals so they can connect to an RFID reader when they get close, whereas passive RFID tags only receive power when they are within the RF field generated by the RFID reader.

RFID is used for a wide range of applications, including but not limited to access control, material tracking, wireless payments, time attendance, inventory control, medical, and fitness equipment.

Compared to other recognition methods (such as barcodes), it brings many benefits, such as:

• Recognition of moving objects

• Easy to install and integrate

• Track multiple projects simultaneously

• No special positioning or optics required