Published on October 19, 2008
DESCRIPTION OF KEYWORDS VTTS: Vehicle Tracking and Ticketing System Antenna: The tag antenna is the conductive element that enables the tag to send and receive data. Passive, low- (135 kHz) and high-frequency (13.56 MHz) tags usually have a coiled antenna that couples with the coiled antenna of the reader to form a magnetic field. Bar code: A standard method of identifying the manufacturer and product category of a particular item. The barcode is easier for machines to read than optical characters. Barcodes’ main drawbacks are they don’t identify unique items and scanners have to have line of sight to read them. Radio Frequency Identification (RFID): A method of identifying unique items using radio waves. Typically, a reader communicates with a tag, which holds digital information in a microchip. RFID tag: A microchip attached to an antenna that is packaged in a way that it can be applied to an object. The tag picks up signals from and sends signals to a reader. The tag contains a unique serial number, bu t may have other information. Passive tag: An RFID tag without a battery. When radio waves from the reader reach the chip’s antenna, the energy is converted by the antenna into electricity that can power up the microchip in the tag. Active tag: An RFID tag with a battery. It has its own power source from which it can get the power for the microchip. Reader: A device used to communicate with RFID tags. The reader has one or more antennas, which emit radio waves and receive signals, back from the tag. The re ader is also sometimes called an interrogator because it quot;interrogatesquot; the tag. Writer: A device used to write the customer information about the onto the tag. Microchip: A microchip is a unit of packaged computer circuitry that is manufactured from a material such as silicon at a very small scale.
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