RFIDRADIO FREQUENCY IDENTIFICATION

BY:

VATSALYA SAXENA

Presentation Objectives:

• Explain technical principles behind RFID

• Provide overview of RFID technology

• Discuss:– Forces driving the adoption of RFID– Challenges RFID deployment must overcome – The future

What is RFID?

• Radio-frequency identification (RFID) is an automatic identification method using radio waves.

• RF signals transmitted by the transceiver activates the transponder, which transmits data back to the transceiver.

• Requires no line-of-sight (like bar-codes)

The RFID System

1. Tag. 2. Reader. 3. Reader antenna.4. Host and software

system.

Types of Tags– Passive

• Operational power scavenged

from reader radiated power

– Semi-passive• Operational power provided by battery

– Active• Operational power provided by battery - transmitter built

into tag

READER

A device that is used to interrogate an Tag. Basic components are A scanning Antenna A transceiver with a decoder to interpret data helps in personalize & read data.

Reader Tag Interaction

Frequency

LF band: 125 and 135 kHz--LF generally use passive tags HF band 3 MHz to 30 MHTypical Frequency: 13.56 MHz--HF system uses passive tags . UHF band:300MHZ to 1GHZTypical Frequency :915 MHz--Uses both active and passive tags MW band > 1GHZTypical freqency:2.45 GHZ

APPLICATIONS

1. Tracking Books in Libraries.

2. Passports ( passports recently).

3. For toll booths (or any “pay for entry” System).

4. Animals Tracking.

Portal application:- Bill of ladingPortal application:- Bill of lading Material tracking Material tracking

Bill of LadingMaterial Tracking

Advantages

• Contactless. An RFID tag can be read without any physical contact between the tag and the reader.

• Absence of line of sight. A line of sight is generally not required for an RFID reader to read an RFID tag.

Wide data-capacity range.

Support for multiple tag reads.

DISADVANTAGES

• High cost.

• Tag collision.

• Reader collision.

• Impacted by environmental factors.

FUTURE

RFID, is an emerging technology which can be used for a variety of applications.

However, the potential for abuse of this

technology is vast and requires careful consideration to avoid.

RFID IS A SUPPORTING TECHNOLOGY--- NOT A COMPETING !!

REFRENCES

• http://www.technovelgy.com/ct/Technology-Article.asp?ArtNum=57

• http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.182.5224

• http://en.wikipedia.org/wiki/Radio-frequency_identification

THANK “YOU”THANK “YOU”