Post on 22-Jan-2018
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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