Radio Frequency Identification (RFID): Definitions(some of the of terms used in RFID technology)A Primary list of RFID TermsData Transfer Rate
The number of characters that can be transferred from an RFID tag to a reader within a given time.
Baud rates are also used to quantify how fast readers can read the information on the RFID tag. This differs from read rate, which refers to how many tags can be read within a given period of time. Decibel (dB)
A measure of the gain of an antenna.
See Antenna Gain for more information. De-tune
UHF antennas are tuned to receive RFID waves of a certain length from a reader, just as the tuner on the radio in a car changes the antenna to receive signals of different frequencies.
When UHF antenna is close to metal or metallic material, the antenna can be detuned, resulting in poor performance. Die
The silicon block onto which circuits have been etched to create a microchip.
Duplex
A channel capable of transmitting data in both directions at the same time.
A half duplex is a channel capable of transmitting data in both directions, but not simultaneously. Duty Cycle
The length of time the reader can be emitting energy.
Regulations in the European Union say readers can be on only ten percent of the time. EEPROM (Electrically Erasable Programmable Read-Only Memory)
A method of storing data on microchips.
Usually bytes can be erased and reprogrammed individually. RFID tags that use EEPROM are more expensive than factory programmed tags, where the number is written into the silicon when the chip is made, but they offer more flexibility because the end user can write an ID number to the tag at the time the tag is going to be used. Effective isotropic radiated power (EIRP)
A measurement of the output of RFID reader antennas used in the United States and elsewhere.
EIRP is usually expressed in watts. Effective radiated power (ERP)
A measurement of the output of RFID reader antennas used in Europe and elsewhere.
ERP is usually expressed in watts and is not the same as EIRP. Electromagnetic interferance (EMI
Interference caused when the radio waves of one device distort the waves of another.
Cells phones, wireless computers and even robots in factories can produce radio waves that interfere with RFID tags. Electromagnetic Library Security System
A security system that uses magnetic strips in objects that are read by a scanner in an antenna or a sensitizer/desensitizer.
Electronic Article Surveillance (EAS
1. Simple electronic tags that can be turned on or off.
When an item is purchased (or borrowed from a library), the tag is turned off. When someone passes a gate area holding an item with a tag that hasn't been turned off, an alarm sounds. EAS tags are embedded in the packaging of most pharmaceuticals. They can be RF-based, or acousto-magnetic. Electronic Product Code: (EPC)
A serial, created by the Auto-ID Center, that will complement barcodes.
The EPC has digits to identify the manufacturer, product category and the individual item. EM
Electromagnetic.
EPC Discovery Service
An EPC Global Network service that allows companies to search for every reader that has read a particular EPC tag.
List of Radio Frequency Identification or RFID articles.If there are any numbers below, use them to see other pages in this unit.
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