RF Identification (RFID) is a wireless identification system that consists of two parts: tags and readers. The RFID reader consists of one or more antennas that transmit radio waves and receive signals back from the RFID tag.
RFID readers transmit radio frequency signals (RF) via an antenna and are used in conjunction with RFID tags. An antenna radiates the RF energy, and it is absorbed by the RFID tag attached to a good or material as it is radiated by the antenna. It uses the energy absorbed by the tag to "power up" and transmit data from the embedded chip in the tag when the tag is powered up.
RFID readers
consist of three components: scanning antennas, transceivers, and
transponders. RFID readers or interrogators are devices that combine
scanning antennas and transceivers. RFID readers come in two types:
fixed readers and mobile readers. Portable and permanent RFID readers
can be network-connected devices. The tag is activated by transmitting a
signal using radio waves. When activated, the tag sends waves back to
the antenna, where they are converted into data.
Transponders are
embedded in RFID tags. Factors such as tag type, reader type, RFID
frequency, and interference from the surrounding environment or other
RFID tags and readers affect the read range of RFID tags. The reading
range of tags with stronger power sources is also longer.
