RFID Technology is explained ...

A simple explanation of RFID technology ...

... ""Radio frequency identification (RFID) A way of wirelessly collecting and storing data using a small object, usually a tag or sticker. The object or tag carries an antenna to enable it to receive and respond to radio frequency queries from an RFID receiver." ...

Via vnuNet: Technology explained: Radio frequency identification (RFID)

RFID read range is explained ...

... ""The distance from which a tag can be read is called read range. Many factors contribute to the read range of passive tags including operation frequency, antenna power, tag orientation and interference from other devices. Low frequency tags are detected in milliseconds at close range from a few inches to about a foot (0.33 meter) in distance. Tags can be read through materials such as soil, wood and water. Ferrous metals and noisy environments can cause interference between the electromagnetic communication of the reader and tag. " ...

Via Biomark: RFID Tag, EID Tag, PIT Tag, Reader, and Antenna Research Technology Providers

... "Radio frequency identification (RFID) first appeared in tracking and access applications during the 1980s. These wireless AIDC (Automatic Identification Data Collection) systems allow for non-contact reading and are effective in manufacturing and other hostile environments where bar code labels could not survive. " ...

AirGate Technologies Explains RFID Technology ...




... "Basicly a RFID scanner works by transmitting a certain frequency (125Khz is very common). The tag has a L/C (coil-capacitor) ciruit tuned to this frequency. It uses energy from the circuit to power a tiny circuit (that's how it can work without a battery), which will then send it's stored code. It sends the information back to the scanner by effectively shorting out it's receiver circuit. Doing so drains more energy from the transmitter circuit on the scanner, which can be measured and so the code that the tag send can be decoded." ...

Via Slashdot: Gillette Pulls RFID Tags In UK Amid Protests ...

... "An RFID (Radio-Frequency IDentification) tag consists of a small integrated circuit attached to a small antennae, capable of transmitting a unique serial number a distance of several meters to a reading device in response to a query. Most RFID tags are passive: they are batteryless and obtain the power necessary to operate from the query signal itself. RFID tags are already quite common; examples include proximity cards used as replacements for metal door keys, theft-detection tags attached to consumer goods such as clothing, and the small dashboard devices for automating toll payments." ...

The Blocker Tag: Selective Blocking of RFID Tags for Consumer Privacy

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