Created by-Narsa RamECE-173/12

Dated-07/11/2015Credits to-Amit sir/Web Tek Labs

Private Ltd.

RFID conceptspoints to be covered are as

follows:-1)Introduction2)Historic development

3)Current RFID technology

3.1)Energy sources3.2)Frequency

bands3.3)standards3.4)RFID system

4)Working principle5)security6)Application

1)Introduction:- RFIDRadio Frequency

Identification tags or simply “tags” are

small transponders that respond to

queries from a reader by wirelessly

transmitting a serial number or similar

identifier using radio frequency waves.

2)Historic development:-The first RFID application was the “identification friends or

foe”(IFF) system ans it was used by the british in the 2nd world war.The first commercial RFID

application was “Electronic Article surveillance”(EAS). It was developed in the seventies as a

theft prevention system.

3)Current RFID technology:-This section describes out of

which parts RFID tags consists of,how they work in principle and

what types of tags do exist.it focuses on how tags are powered

and what frequency bands are used.

RFID transponders In general consists of:-1)chip 2)Antenna

3)case 4)battery(for active tags only)

3.1)Energy sources:-3-types of transponders(tags) in relation to power or

energya)Passive tags-do not have an internal power

source -rely on power induced by reader through

mutual inductance-ranges between 2mm and a few meters.

b)semi-passive tags-sometimes uses battery depending upon application

c)Active tags-contain an internal power source

-signal strength is high as compare to semi and passive tags

3.2) Frequency bands-low frequency : 30-500khzHigh frequency :10-15Mhz

Ultra frequency :850-950Mhz,2.4-2.5Ghz,5.8Ghz.

3.3)standards:-A short list of RFID standards follows: ISO 11784, ISO 11785, ISO 14223,

ISO 10536, ISO 14443, ISO 15693, ISO 18000.

3.4)RFID system:-A rfid reader and few tags are in general of little

use.the retrieval of a serial number does provide much

information to the user nor does it help to keep track of items in a

production chain.the real power of rfid comes in combination with a

backend that stores additional information such as descriptions

for products and where and when a certain tag was scanned.

4)Working principle:-Transfer of energy(data) from one

ckt(reader)to another(transponde)through a

shared magnetic field by mean of mutual inductance powers

microchip-circuitry uses load modulation to

send data back to reader.

5)Security:--privacy-Authentication-Attack ranges

-Attacks again RFID system6) Application area:-

-people,animal etc tracking-Document tracking

-Health care-Manufacturing

-Attendance based system like classes,offices etc…

-Laptop tracking-used in Automatic toll tax

payment

“We need technology in every classroom and in everystudent and teacher’s hand because it is the pen andpaper of our time,and it’s the lens through which weexperience much of this world” –David Warlick

THANKU YOU

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