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Radio Frequency1


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Radio Frequency1

  1. 1. Radio Frequency Identification (RFID) Presented by
  2. 2. Outlines <ul><li>Automatic Identification Data Capturing Technology </li></ul><ul><li>What is RFID? </li></ul><ul><li>Why RFID? </li></ul><ul><li>Components of RFID </li></ul><ul><li>Transponder </li></ul><ul><li>Applications </li></ul><ul><li>Pros & Cons </li></ul><ul><li>Conclusion </li></ul>
  3. 3. Automatic Identification Data Capturing Technology <ul><li>Optical : Barcodes </li></ul><ul><li>Magnetic : Magnetic stripe travel cards etc. </li></ul><ul><ul><li>Electronic : RFID tags, smart cards, simcards </li></ul></ul>
  4. 4. What is RFID Radio frequency identification (RFID) is an automated data capture technology that can be used to electronically identify, track, and store information contained on a tag that is attached to or embedded in an object, such as a product, case, or pallet.
  5. 5. Why RFID <ul><li>The tag can provide other information such as expiry date , price & information of product. </li></ul><ul><li>Data can be transmitted without contact. </li></ul><ul><li>RFID can be placed inside indoor environment. </li></ul><ul><li>Dynamic information exchange. </li></ul>
  6. 6. Components for RFID
  7. 7. Transponder Different types of RFID tags Micro tag Transmitter + Responder
  8. 8. How Transponder Works
  9. 9. Contd.. <ul><li>When reader is to be read the reader sends a 134.2 KHz to antenna for 50ms. </li></ul><ul><li>Magnetic field generated is collected by tag & tag is tuned to that frequency. </li></ul><ul><li>The energy is rectified & stored in small capacitor. </li></ul><ul><li>When power pulse is finished the tag transmits data using stored energy of capacitor as power source. </li></ul><ul><li>Once transmission is over capacitor is discharged & tag ready for next cycle. </li></ul><ul><li>The period of transmission pulses is 20 to 50ms. </li></ul><ul><li>Transmission technique is FSK. </li></ul>
  10. 10. Types of Transponder <ul><li>Passive </li></ul><ul><li>Simplest in version. </li></ul><ul><li>Power source absent. </li></ul><ul><li>Tag responds to reader radio wave and derives power from the energy waves transmitted by reader . </li></ul>
  11. 11. Contd…… <ul><li>Semi passive </li></ul><ul><li>Do not initiate communication with reader. </li></ul><ul><li>Contains batteries that allow tag to perform other operations such as powering tag’s internal electronics. </li></ul><ul><li>Active </li></ul><ul><li>Contains power source & a transmitter. </li></ul><ul><li>Sends continuous signal & initiates communication with reader. </li></ul>
  12. 12. Reader and Database
  13. 13. Contd… <ul><li>Reader uses own to communicate with tag. </li></ul><ul><li>When reader broadcasts radio waves all tags designated to respond that frequency will respond . </li></ul><ul><li>Multiple processing. </li></ul><ul><li>Mobile or stationary. </li></ul><ul><li>Information stored in database include identifier ,description ,manufacturer etc. </li></ul>
  14. 14. Range of Frequency and bandwidth <ul><li>Low-frequency bands range from 125 KHz to 134 KHz. </li></ul><ul><li>High-frequency bands operate at 13.56 MHz . </li></ul><ul><li>Ultrahigh-frequency tags operate around 900 MHz . </li></ul><ul><li>microwave frequencies typically 2.45 GHz and 5.8 GHz. </li></ul>
  15. 15. Reading range of reader Reading range changes with the direction of the tag w.r.t. the reader
  16. 16. Security <ul><li>Encrypting the data in the tags. </li></ul><ul><li>verifying the claimed identity of a user. </li></ul><ul><li>… </li></ul>
  17. 18. Contd…
  18. 19. <ul><li>Automatic reads </li></ul><ul><li>Active chips can be written to </li></ul><ul><li>Many chips can be read Simultaneously </li></ul><ul><li>Standardized and unique encoding </li></ul>Contd… Before tag implantation After tag implantation
  19. 21. Conclusion Use of RFID is likely to increase in the near future. At present, it is unclear whether the effects of the use of RFID technology will be evident in broad measures of economic activity like output or productivity growth. As businesses gain experience with RFID, they may be able to redesign business processes to take advantage of the strengths of the technology and the information that flows from its use.
  20. 22. Web Resources <ul><li> </li></ul><ul><li> </li></ul><ul><li> </li></ul><ul><li> </li></ul><ul><li> </li></ul><ul><li> </li></ul><ul><li> </li></ul>
  21. 23. THANK U
  22. 24. Qns