RFID (Radio Frequency Identification)
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RFID (Radio Frequency Identification) is a technology that uses electromagnetic fields to automatically identify and track tags attached to objects or living beings. RFID tags contain electronically stored information that can be remotely read using an RFID reader or scanner. The tags consist of an integrated circuit (IC) and an antenna, which enable them to transmit data wirelessly to the reader when activated by radio waves. RFID technology is widely used in various applications, including inventory management, access control, asset tracking, contactless payment systems, and supply chain logistics. RFID systems can operate in different frequency bands, including low-frequency (LF), high-frequency (HF), and ultra-high-frequency (UHF), each offering different ranges and capabilities. RFID offers advantages over traditional barcode-based identification systems, including faster read speeds, longer read ranges, and the ability to read multiple tags simultaneously. However, RFID technology also raises privacy and security concerns, as it can potentially be used for unauthorized tracking or surveillance.
References: - https://en.wikipedia.org/wiki/Radio-frequency_identification
- Snippet from Wikipedia: Radio-frequency identification
Radio-frequency identification (RFID) uses electromagnetic fields to automatically identify and track tags attached to objects. An RFID system consists of a tiny radio transponder called a tag, a radio receiver, and a transmitter. When triggered by an electromagnetic interrogation pulse from a nearby RFID reader device, the tag transmits digital data, usually an identifying inventory number, back to the reader. This number can be used to track inventory goods.
Passive tags are powered by energy from the RFID reader's interrogating radio waves. Active tags are powered by a battery and thus can be read at a greater range from the RFID reader, up to hundreds of meters.
Unlike a barcode, the tag does not need to be within the line of sight of the reader, so it may be embedded in the tracked object. RFID is one method of automatic identification and data capture (AIDC).
RFID tags are used in many industries. For example, an RFID tag attached to an automobile during production can be used to track its progress through the assembly line, RFID-tagged pharmaceuticals can be tracked through warehouses, and implanting RFID microchips in livestock and pets enables positive identification of animals. Tags can also be used in shops to expedite checkout, and to prevent theft by customers and employees.
Since RFID tags can be attached to physical money, clothing, and possessions, or implanted in animals and people, the possibility of reading personally-linked information without consent has raised serious privacy concerns. These concerns resulted in standard specifications development addressing privacy and security issues.
In 2014, the world RFID market was worth US$8.89 billion, up from US$7.77 billion in 2013 and US$6.96 billion in 2012. This figure includes tags, readers, and software/services for RFID cards, labels, fobs, and all other form factors. The market value is expected to rise from US$12.08 billion in 2020 to US$16.23 billion by 2029.