INTRODUCTIONRadio frequency identification, also known as RFID, is the non-contact wireless use of electromagnetic radio frequency to transfer data, for the purpose of automatically identifying and tracking tags on attached objects . Tags contain information stored electronically. Some tags are powered and read over a short distance via a magnetic field. But barcode tags do not need to be in the readers' field of vision and can be embedded in the tracked object. Many industries use RFID tags. RFID tags have been used by vehicles such as cars to track progress through the installer's ranks. Farm animals have also been injected for using RFID tags to track positive identification. Even so, this RFID can also pose serious privacy concerns because RFID tags can be used on anything, such as cash, property, clothing, animals, and even people. RFID Frequency Bands Band Regulation Range Data Rate Remarks Approximate Tag Cost Volume (2006) US$120–150 kHz (LF) Unregulated 10 cm Low Animal Identification, Factory Data Collection $113.56 MHz (HF) ISM band worldwide10 cm - 1 m Low to moderate Smart cards (MIFARE, ISO/ IEC 14443) $0.50433 MHz (UHF) Short range devices 1–100 m Moderate Defense applications, with active tags $5865-868 MHz (Europe)902-928 MHz (North America) ISM Band UHF 1–12 m Moderate to High EAN, various standards $0.15 (passive tags)2450-5800 MHz (Microwave)ISM Band 1–2 m High 802.11 WLAN, Bluetooth standard $25 (active tags)3.1–10 GHz (microwave) Ultra-wide band up to 200M High requires semi-active or active $5 projected tagsFigure 1THE APPLICATION OF THE TECHNOLOGYWHEREThe RFID tag can be attached to an object and used to secure and manage inventory, resources and people. For example the......middle of the sheet......contents• Actual frequency varies by countryMicrowave frequency (204 – 5.8GHz)• Small tag size• Limited number of providers• Costs high• More common for active tagsCONCLUSIONThe bottom line is that many companies and factories use RFID because the benefits are multiple. First of all, it is a tag capable of reading the programmed barcode. Furthermore, RFID will have a significant impact on our daily lives and the way we interact with the world around us.REFERENCES• http://en.wikipedia.org/wiki/Radio-frequency_identification#See_also• http://www .abr .com/how-does-RFID-work• http://www.technovelgy.com/ct/Technology-Article.asp?ArtNum=2• http://www.simonsothcott.com/2011_11_01_archive.html• http :/ /www.radio-electronics.com/info/wireless/radio-frequency-identification-rfid/lf-uhf-tag-reader-writer-antennas.php