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| Vecta on RF Tagging | ||||||||||
| RF tagging uses some
form of radio-frequency coupling or transmission between
a reader and transmitter to detect the proximity of a
tagged article for security or tracking purposes. Tags have to be attached to the objects being tracked or detected and come in two main forms - passive or active. |
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| Passive tags
usually comprise only inductive and/or capacitive
components and, when within a few 10s of centimetres of a
detector, disturb a tuned circuit in the detector so the
object's presence is detected. Active tags have more capability and generally receive an interrogation signal and include additional information in a reply. They have a range of several 10s of metres but are physically larger and more expensive than passive tags due to their active circuitry and battery. Ultra-Wide band radio technology could be the key to greater RFID tag range at lower cost |
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| RF tagging is becoming more widespread as the costs of active tags and their supporting systems are falling allowing them to be applied to an ever wider variety of applications; organic semiconductors may be the key to reducing costs below the point at which widespread deployment takes off. | ||||||||||
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| More info from: Terry.Moore@vecta5.com | ||||||||||
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2 The Spinney, © 2001-2013 Vecta Consulting Limited |
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