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by James Marriot
RFID (Radio Frequency Identification) is an automatic identification method that relies on storage & remotely data retrieval devices known as RFID tags.
RFID tags can be incorporated within a product, person or an animal, with the intention of identification by making use of radio waves. RFID tags mainly uses silicon chips & antennas. Active tags require power for their working whereas passive tags need no inbuilt power sources.
RF fibers or chipless RFID tags are the ones that make use of no IC (integrated circuit) technology for the storage of information. The RFID tags make use of fibers or materials, which reflect a part of the reader's indication back; an exceptional return sign that may be used like an identifier.
RFID tags that are chip-based can be utilized in various types of environments than the RFID tags having electronic circuits. Chipless tags are, at times, used for the purpose of anti-counterfeiting of documents. But because the tags cannot transfer a sole serial number, their utility is less in supply chain market.
Passive RFID tags do not make use of battery; thus, here, the reader supplies the power. As a result, the reader's radio waves encounter passive RFID tags, and thus the coiled antenna inside the RFID tags develops a magnetic field. This leads to tags drawing power from them and thereby, energizing the tags circuits. At times, active tags have batteries that are replaceable, thus, they can be used for years, whilst other units are sealed.
For further information about RFID Tag System and the growing RFID industry, read the report " RFID in the Manufacturing Sector (2005)" published by RNCOS at: http://www.rncos.com/Report/COM22.htm
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