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RFID Technology - Some Basic Information
RFID or Radio Frequency Identification, is the new technology talked about for product identification and data storage that can be utilized where barcodes fail. It is primarily based on the same concept as barcode except that the method of encoding data is completely different since barcodes require a line of sight optical scan. As an computerized identification technology it reads encoded data with the aid of radio frequency waves. Its biggest advantage is that it doesn't essentially want a tag or label to be seen to read the data stored.
RFID tags fall into two categories, active or passive. Active tags have an internal battery with a read and write option, permitting modification of data. The memory size of the tag is variable with some tags having memory area of up to 1 MB. Passive RFID tags don't have an external energy source and instead use the ability generated from the reader. They're due to this fact lighter, cheaper, and have an unlimited lifetime of operation, unlike active tags have a ten-yr span. Passive RFID tags are programmed with a particular set of data that can't be changed and being read-only, they operate as a license plate in a database.
Passive RFID tags have a low-energy integrated circuit connected to an antenna and a protective packaging is used to enclose it relying on the application it goes for use for. The IC has an on-board memory that stores data. The IC makes use of the antenna to obtain and transmit information to an external reader, generally referred to as an interrogator. Tags are additionally called inlays and transponders. In technical terms an inlay is just a tag on a versatile substrate ready for conversion into a smart label. The smart label can extend the basic functioning of RFID by combining barcode technology and human readable information. Smart labels embrace an adhesive label embedded with an RFID tag inlay. Thus they provide the benefits of read range and the unsupervised capability of tags, with the flexibility and comfort of on-demand label printing.
RFID systems have variable frequency ranges, and the frequency level decides their use for applications. Their biggest asset is their operation without a line-of-sight and without contact. Thus they are often read by means of fog and snow, heat and mud, and different environmentally tough conditions where barcodes or any other optical identification systems would fail. Their high reading speeds are another advantage despite the fact that RFID technology is more expensive.
At current nearly every RFID implementation is different because of the performance necessities and cost factors besides the signal transmission restrictions. They are used where barcodes prove inadequate but that does not men that RFID technology will change barcodes. The market is big enough for both to continue side by side.
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