RFID technology uses radio waves to identify objects without physical contact or line of sight. An RFID system consists of RFID tags attached to objects, RFID readers that can read tag data, and a host computer system. RFID tags contain antennas to receive and respond to radio-frequency queries from RFID readers, and some tags are passive while others are active. RFID provides advantages over barcodes by allowing multiple items to be identified simultaneously without scanning each item. Common applications of RFID include supply chain management, asset tracking, and automated payment systems.

1. RFID: Technology and
Applications
MOUMITA SADHUKHAN (067)
KOUSTABH SENGUPTA (073)
ARPAN MANDAL (093)
ANKITA CHAKRAWARTI (095)
ANAL MANDAL (101)
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2. Outline
 Overview of RFID
 RFID
 ADC
 System Overview
 RFID Tag
 RFID Reader
 RFID Technology
Applications
 RFID Advantage
 Summary 19-05-2020
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Fig: 01

3. What is RFID?
 RFID = Radio Frequency IDentification.
 An ADC (Automated Data Collection) technology
that:
 Uses radio-frequency
 Does not require physical sight or contact
 Provide unique identification
 Other ADC technologies: Bar codes, OCR.
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Fig: 02

4. RFID system components
Ethernet
RFID
Reader
RFID Tag RF Antenna Network Workstation
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5. RFID tags: Smart labels
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A paper label
with RFID inside
an antenna,
printed, etched
or stamped
on a substrate
e.g. a plastic
foil
a chip
attached to it
Source: www.rfidprivacy.org
Fig: 03

6. RFID tags
Tags can be attached to
almost anything:
 Items, cases or pallets of products, high
value goods
 vehicles, assets, livestock or personnel
Passive Tags
Semi passive tag
Active Tags
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Fig: 04

7. Tag block diagram
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Antenna
Power Supply
Tx Modulator
Rx Demodulator
Control Logic
(Finite State
machine)
Memory
Cells
Tag Integrated Circuit (IC)
Block Diag: 02

8. Some RFID tags
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Fig: 07
Fig: 06
Fig: 05

9. RFID readers
 Reader functions:
 Remotely power tags
 Establish a bidirectional data link
 Inventory tags, filter results
 Communicate with networked server(s)
 Can read 100-300 tags per second
 Readers (interrogators) can be at a fixed point such as
 Entrance/exit
 Point of sale
 Readers can also be mobile/hand-held 19-05-2020
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Fig: 08

10. Reader anatomy
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915MHz
Radio
Network
Processor
Digital Signal
Processor
(DSP)
13.56MHz
Radio
Power
Supply
Fig: 09

11. Some RFID readers
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Source: www.buyrfid.org
Fig: 10
Fig: 11
Fig: 12
Fig: 13
Fig: 14

12. RFID application points
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 Assembly Line
Wireless
Bill of Lading
Material Tracking
 Handheld Applications
 Shipping Portals
Fig: 17
Fig: 16
Fig: 15

13. RFID advantages over bar-codes
 No line of sight required for reading
 Multiple items can be read with a single
scan
 Each tag can carry a lot of data
(read/write)
 Individual items identified and not just the
category
 Passive tags have a virtually unlimited
lifetime
 Active tags can be read from great
distances
 Can be combined with barcode
technology
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14. RFID Summary
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Strengths
 Advanced technology
 Easy to use
 High memory capacity
 Small size
Weaknesses
 High cost per unit and high RFID system
integration costs
 Weak market understanding of the benefits
of RFID technology
Opportunities
 Could replace the bar code
 Huge market potential in many businesses
Threats
 Ethical threats concerning privacy life
 Highly fragmented competitive environment

15. References : Some Links
 http://www.epcglobalinc.com/
 http://www.rfidjournal.com/
 http://rfidprivacy.com/
 http://www.rfidinc.com/
 http://www.buyrfid.com/
Thank You
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