PLANAR INVERTED MULTIBAND

SLOTTED PATCH ANTENNA FOR

RFID APPLICATION

Presented by

SRITHAR.A,PG Student

Dr.E.D.KANMANI RUBY, Professor

G.DEEPA, Assistant Professor

Kongu Engineering College, Perundurai, Erode

OBJECTIVE

• Design of an antenna for RFID Application

• Features of the new design

- Avoid metal-water problem

- Enhance the reading range with suitable

operating frequency

- Flexibility

PRACTICAL IMPORTANCE OF RFID

• Barcode

• Optical Character Recognition

• Biometric

• Smart Card

• RFID

Man power needed

No need of Man power

FEATURES OF RFID

• Non-Line-of-Sight

• Multiple RW

• Reliability in reading

• Environmental Susceptibility/Durability

• Difficult to Replicate

• Access Security

• Read Range

• Memory Size/Data Storage

APPLICATIONS

• Asset Tracking

• Book access in Library

• Healthcare

• Toll Road

• Boarding Baggage

• Manufacturing automation

• Logistics and distribution

• Retail shops

• Product security

EXISTING LIMITATIONS OF RFID

• Lack of accuracy

• The costs of developing RFID is costlier than

barcodes

• A lack of global standards and regulations

SPECTRUM FOR RFID

APPLICATION

• Low Frequencies (LF)—125–134 kHz

• High Frequency (HF)—13.56 MHz

• Ultra High Frequency (UHF)—860–960 MHZ

– Inductive coupling and back scattering problems occurs in

above frequency ranges

• Microwave—ISM band (range from 6.765 MHz to

246 GHz)

• 2.45 GHz free band is fully utilized for many wireless

applications

PROBLEMS IN LOWER

FREQUENCY RANGE

Designation Frequency Passive Read Distance

Low Frequency (LF) 120-140 KHz10-20 cm

High Frequency (HF) 13.56 MHz10-20 cm

Ultra-High Frequency

(UHF)868-928 MHz

3 meters

Microwave 2.45 & 5.8 GHz 3 meters

Ultra-Wide Band (UWB) 3.1-15.78 GHz 10 meters

EXISTING SYSTEM

• Design an RFID antenna in UHF range

• Multiple tag reading is not possible

• RFID suffered from metal-water problem

• Reading rate slower

• Passive tag costlier and complex

• Size of the antenna is big

PROPOSED SYSTEM

• Design an RFID antenna in UWB range

– Resistance to metal-water problem

– Low-profile and high data rate

– Immune to EMI

– Prosperous suit to active tag as well

• Reduction in the antenna size

DESIGN PROCEDURE

• Calculation of the Width (W)

𝑊 =𝑣𝑜

2𝑓𝑟

2

𝜀𝑟+1

• Calculation of Effective dielectric constant (εreff)

𝜀𝑟𝑒𝑓𝑓 =𝜀𝑟 + 1

2+𝜀𝑟 − 1

21 + 12

ℎ

𝑊

−1 2

• Calculation of the length extension (∆L)

∆𝐿

ℎ= 0.412

𝜀𝑟𝑒𝑓𝑓 + 0.3 (𝑊ℎ+ 0.264)

(𝜀𝑟𝑒𝑓𝑓−0.258)(𝑊ℎ+ 0.8)

• Calculation of actual length of patch (L)

𝐿 =λ

2− 2∆𝐿 =

c

2𝑓 𝜀𝑟𝑒𝑓𝑓− 2∆𝐿

SPECIFICATION OF ANTENNA

Substrate Material used Reinforced Fiber-Glass Polymer Resin Material

With dielectric constant of 4.6

Radiation Pattern Omni-Directional

Feeding method 50-Ωmicrostrip feed line

ANTENNA PROTOTYPE

DESIGN VALUES OF ANTENNA

Parameters L L1 L2 L3 L4 L5

Value

(mm)15 5 2 2 6.5 6.5

Parameters W W1 W2 W3 W4 W5

Value(mm) 12 4.5 4.5 3 4 4

RETURN LOSS

Frequency vs Return Loss (S11)

Cont’d…

Radiation pattern

Cont’d…

Frequency vs VSWR

CONCLUSION

• Designed UWB antenna has

– Improved data rate of 86% approximately

– Size reduced to 50% approximately

– Power consumption 38%

• Hence flexible implementation for RF application is

possible.

REFERENCES

1. V. D. Hunt, A. Puglia, and M. Puglia, RFID: A Guide to Radio FrequencyIdentification, John Wiley & Sons, New York, NY, USA, 2007.

2. J. S. Colburn, “Patch antennas on externally perforated high dielectric constantsubstrates,” IEEE Transactions on Antennas and Propagation, vol. 47, no. 12, pp.1785–1794, 1999.

3. Y. L. Chow and K. L. Wan, “Miniaturizing patch antenna by adding a shorting pinnear the feed probe—a folded monopole equivalent,” in Proceedings of the IEEEAntennas and Propagation Society International Symposium, vol. 4, pp. 6–9, June2002.

4. M.H. Song and J. M.Woo, “Miniaturization of microstrip patch antenna usingperturbation of radiating slot,” Electronics Letters, vol. 39, no. 5, pp. 417–419,2003.

5. RFID (Radio Frequency Identification): Principles and Applications Stephen A.Weis MIT CSAIL

6. M.I. Sabran, S.K.A. Rahim, A.Y.A. Rahman, T.A. Rahman, M.Z.M. Nor, andEvizal, “A Dual-Band Diamond-Shaped Antenna for RFID Application,” IEEEAntennas and Wireless Propagation Letters, Vol. 10, 2011, pp. 979 –982,2011.

Cont’d…

7. Guo Liu, Liang Xu, and Zhensen Wu “Miniaturized Circularly Polarized

Microstrip RFID Antenna Using Fractal Metamaterial”Hindawi Publishing

Corporation International Journal of Antennas and Propagation Volume 2013,

Article ID 781357, 4 pages,2013.

8. Yuan Yao, Youbo Zhang, Junsheng Yu, and Xiaodong Chen “Compact and

Circular Polarized RFID Antenna forPortable Terminal Applications”Hindawi

Publishing Corporation International Journal of Antennas and Propagation

Volume 2013, Article ID 982813, 6 pages,2013.

9. Constantine A. Balanis, 2005 A Hand book on “Antenna Theory: Analysis and

Design (3rd Edition)” John Wiley & Sons.

10. Daniel D. Deavours, Mutharasu Sivakumar “Microstrip antenna for RFID device

having both far-field and near-field functionality” US Patents no 20140008447

A1,2010.