Rfid Modified

Radio Frequency IDentification

Ramannagari Shyamprasad Goud

Outline  Description of the Technology  

What is RFID Benifits of RFID Technology

 Technical Information     

RFID System Principle circuit of RFID-system Coupling Overview RFID Circuitry RFID Standards

 Practical Information  11/14/09

Real World Applications Radio Frequency IDentification

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What is RFID ?  Short range radio technology used to communicate information between a stationary location and a movable object  Subset of Auto-identification Techniques  Allows for identification of objects without any human intervention  Data is retrieved and stored remotely using wireless technology  Can store wide variety of data

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Benifits of RFID Technology  No line of sight access needed for reading tag  Read range is much larger than barcodes  Multiple tags can be read simultaneously by a reader  Detailed information collected in one pass rather than individual scans of a product  More data can be stored than a barcode which has only an identification number 11/14/09

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RFID System Communication Infrastructure Reader Antenna

Tag

Software system

Reader

Controller

Sensor

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RFID System

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Principle circuit of an RFID-system

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Coupling Overview  Close Coupling Systems    

Range: < 1cm Frequencies: 125 to 134 KHz Based on inductive coupling or capacitive coupling E.g for door locking system

 Remote Coupling Systems    

Range: < 1m Frequencies: 135 KHz to 13.56 MHz Mostly Based on inductive coupling E.g for contcated Smart cardless systems

 Long Range System    

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Range: >1m Frequencies: 860 MHz to 950MHz or 2.45 GHz Also known as backscatter systems E.g for Logistics applications

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RFID Circuitry Rectifier D1

Mutual inductance R3

R1

R5 D4

C6

R4

D2

C1 AC Voltage

Limiter

C2

C3

C4

L1

L2

C5 D3

R2

Reader

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Transponder

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RFID Standards  Standards for logistics applications   

ISO/IEC 18000 ISO/IEC 15961-15963 ISO/IEC 15418

 Standards for automatic livestock identification   

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Standards for vicinity coupling cards    

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ISO/IEC 11784 ISO/IEC 11785 ISO/IEC 14223 ISO/IEC 10373 ISO/IEC 10536 ISO/IEC 14443 ISO/IEC 15693

Supply Chain Management EPC (Electronic Product Code)

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Real World Applications       

Supply chain management Tranportation Payment Systems Building Entrances Parking Automation Library book Tracing Animal Identification Grocery Stores

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Future work  Different types of rectifier structures

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Rectifier circuit using Schottkey barrier diode

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Rectifier circuit using MOSFETs

Different limiter structures

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References  RFID Journal –The World’s RFID Authority. What is RFID http://www.rfidjournal.com/article/articleview/1339/1/129/  Finkenzeller, K., RFID Handbook [Electronic Resource]: Fundamentals and Applications in Contactless Smart Cards and Identification, translated by Rachel Waddington, Chichester, England; Wiley, Hoboken, N. J., c2003  Wikipedia. Radio‐Frequency Identification. http://en.wikipedia.org/wiki/RFID

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