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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’s based on the identical idea as barcode except that the method of encoding data is different since barcodes require a line of sight optical scan. As an automated identification technology it reads encoded data with the aid of radio frequency waves. Its biggest advantage is that it does not necessarily need a tag or label to be seen to read the data stored.

RFID tags fall into two classes, active or passive. Active tags have an internal battery with a read and write option, allowing modification of data. The memory measurement of the tag is variable with some tags having memory space of as much as 1 MB. Passive RFID tags would not have an external energy source and instead use the power generated from the reader. They are subsequently 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 cannot 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 surround 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 receive and transmit information to an exterior reader, usually referred to as an interrogator. Tags are also called inlays and transponders. In technical phrases an inlay is just a tag on a versatile substrate ready for conversion into a smart label. The smart label can lengthen the essential 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 convenience 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 can be read through fog and snow, heat and mud, and different environmentally powerful conditions the place barcodes or any other optical identification systems would fail. Their high reading speeds are another advantage though RFID technology is more expensive.

At current virtually each RFID implementation is completely different because of the performance necessities and value factors besides the signal transmission restrictions. They are used where barcodes prove inadequate but that does not men that RFID technology will exchange barcodes. The market is big sufficient for each to continue side by side.

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