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RFID - Radio-frequency identification

Communication Technology

Ronak S Aswaney, ID: 0710229



Radio-frequency identification.

RFID is a technology that uses radio-frequency waves. RFID

uses tags as a component to transfer data between a readerand a movable item(middleware), which can be used to

identify, categorize & track the data.

RFID is fast, reliable, and does not require physical sight or

contact between reader/scanner and the tagged item.



RFID tag

o Chip

o Antenna

RFID reader or transceiver

o Transmitter and Receiver

o Control Unit

o Antenna

Data processing subsystem

o Middleware



A Tag is a transponder which receives a radio signal and in

response to it sends out a radio signal.

It contains an antenna, and a small chip that stores a smallamount of data.

It can be programmed at manufacture or on installation.

It is powered by the high power electromagnetic field

generated by the antennas.

A multiple number of the tags can be read at a time.

Tags can be attached to almost anything.

Two types: Active & Passive.



Active tags Passive tags

Powered by an internal

battery.Finite lifetime.

Greater range. (Up to 100 M)

Relatively Expensive.

($50 - $250)

Better noise immunity.Higher data transmission

rates.

Operate without battery.Derive power from the fieldgenerate by the reader.Less expensive.($0.50 - $5)Weak range. ( 3 5 M)Subject to noise.Require more powerfulreaders.Very sensitive.



The objective of the Electronic Product Code (EPC) is to

provide unique identification of physical objects.

Header defines data type.

EPC Manager describes originator of EPC (Product

manufacturer)

Object Class - Could describe the product type.

Serial Number Unique ID for that product item.



RFID reader is a device that is used to interrogate an RFID tag.

This is how the Reader works:o The reader has an antenna that emits radio waves.

o The tag then responds by sending back its data.

The reader has two basic components :o A scanning antenna

o A transceiver with a decoder to interpret the data



In short: Data Processing.

It provides reader connectivity to other systems on the

network, translates that data and transmits it to otherapplications.



1940 1950

Based on the experiences with radar usage and radio broadcast technology in the year 1948 a firstscientific article about RFID was announced.

1950 1960

First explorations of RFID technology, laboratory experiments too place.1960 1970

Many theories concerning RFID were developed. First commercial usage in connection with electronic article surveillance equipment to countertheft.

1970 1980

Many institutions (academic, governmental, business) were actively working on RFID and manyadvances have been made during this time.

Some early adopter implementations like vehicle tagging or animals tagging have been realized.1980 1990

Many commercial applications of RFID entered mainstream. Electronic toll collection on roads became the main field of interest in many countries around the

world1990 2006 RFID became widely deployed and therefore a part of everyday life. Beginning of using the same tag for several purposes (toll collection, parking lot access, fare

collection, campus access, ). Also several standards have been adopted.



What will happen if in the coming years, nearly everything is

tagged with a RFID chip?

---- Privacy

RFID is a very hot, hyped field right now; Normal people think

its the best thing ever, while privacy advocates think its the

worst.



THANK YOU!

ANY QUESTIONS?

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