ppt

MICROSTRIP ANTENNA FOR WIDEBAND APPLICATIONS

PRESENTED BY

SHIVKANT THAKUR

112018

P2 PRESENTATION

(M.TECH)

OFM.TECH THESIS

ON

List of contents

• Short review of Work done till p1• Description of problem statement• Literature review• Mathematical modeling• Modular diagram • Conclusion and work to be done till

p3• references

Work done till p1Introduction of microstrip antenna

Basic parameters Design frequency VSWR Return loss Bandwidth Gain Efficiency

Description of problem statementMicrostrip antenna becomes

very popular due to light weight low costSmall sizeEase of integrationMain disadvantage of microstrip antenna Narrow bandwidthObjectiveDesigning a microstrip antenna for wireless LAN applicationsFrequency is 2.4 GHz Bandwidth of antenna used today is 7.8% over the frequency range of 2.33GHz to 2.52GHz

Literature review1. J.A.D Automotif and F.K mekanikal “Wideband

Microstrip Antenna for Land Based Vehicles” Thesis paper Universiti Teknologi Malaysia(2004)

2. Jagdish. M. Rathod “Comparative Study of Microstrip Patch Antenna for Wireless Communication Application” International Journal of Innovation, Management and Technology, Vol. 1, No. 2, June 2010 ISSN: 2010-0248

3. J.A Ansari et.al “ Broadband Rectangular Microstrip Antenna Loaded with a pair of U-Shaped Slot” 978-1-4241-8541-3/10 © 2010 IEEE

4. K.O Odeyemi et.al “ Matlab Based Teaching Tools for Microstrip Patch Antenna Design” Journal of telecommunications, volume 7 ,issue 2,march 2011

5. Binu paul et.al “A New Microstrip Patch Antenna for Mobile Communications and Bluetooth Applications” microwave and optical technology letters/vol .33 no.4 may 20 2002

Cont….

6 . M Ali et.al “Novel Method for Planer Microstrip Antenna Matching Impedance” Journal of telecommunications volume 2 issue 2,may 2010

7. Garima D.Bhatnagar et.al “Design of Broadband Circular Patch Microstrip Antenna with Diamond Shape Slot” Indian journal of radio & space physics vol 40,october 2011,pp 275-281

Transmission line model

Cavity model

Full wave model (integral equation method of moment)

ADVANTA-GES

1.Easiest 2.Good physical insight

1.More accurate then T.L 2.Good physical insight

1.Very accurate

2.very versatile

DISADVAN-TAGE

1.Less accurate2. More difficult to model coupling

1.More complex

2.Difficult to model coupling

1.They are more complex

2.Give less physical insight

Method of analysis

Transmission line model

ɛreff = 2

1

1212

1

2

1

w

hrr 1h

w

Continu..

8.0

264.0

258.0

3.0412.0

hwhw

h

L

reff

reff

LLLeff 2

1

2

2

rrf

cw

Lf

Lreffr

22

1

00

Feeding methods

Microstrip line

Coaxial probe

Aperture coupling

Proximity coupling

advantages

1. Easy to fabricate

2. Simple to match

1. Easy to fabricate and match

2. Low spurious radiation

1. Easy to model

2. Moderate spurious radiation

1. Easy to model

2. Low spurious radiation

disadvantage

1. Limited bandwidth to 2-5%

2. Spurious radiation

1. Narrow bandwidth

1. Narrow bandwidth

2. Difficult to fabricate

1. Fabrication is difficult

Calculation of feed position

substrates material remark

Ceramic-alumina 9.5 0.0003 Low loss, high frequency applications

Teflon 2.08 0.0004 Dimensional stability is poor

FR4 4.4 0.02 Inexpensive, use for commercial application

Duriod 2.2,6.8 0.0017 Excellent dimensional stability

r tan

L

L

Dimension of patchLength=38mmWidth =25mmThickness=1.6mmMaterial chosen for

substrate(FR4)ɛ r=4.4

Frequency=1.9GHz

 IE3D simulation results

Geometry on IE3D simulator of L-shape slot rectangular patch antenna

Geometry on IE3D simulator of L-shape slot loaded rectangular patch antenna

Return loss and VSWR of L-shape slot microstrip

antenna

Return loss VSWR

Return loss and VSWR of L-shape slot loaded

microstrip antenna

Conclusion and work to be done till p3

conclusion: comparing the bandwidth of different thickness

of slots and different length of slots.

work to be done till p3 with respect to thickness and length

comparison, choose those antenna whose bandwidth should be greater than 15% and compatible to wireless LAN

references1. C.A.Balanis, Antenna theory Analysis & Design , 3rd edition, John Wiley & Sons, 2005, ch. 2.

2.I.J.Bahl and P.Bartia,Microstrip Antenna Design Handbook, Artech House, 2001, ch.1 and ch2.

3. Randy bancroft, microstrip and printed antenna design,estern economy edition ,prentice hall of india 2006,ch-1,2.

4. J.A .Ansari,Nagendra prasad yadav,Anurag mishra ,Kamakshi and Ashish singh, ”broadband rectangular microstrip antenna loaded with a pair of u-shaped antenna “,IEEE transactions on antennas and propagation, , Page no. 1 - 5  ,2010.

Continu..

5. K.O Odeyemi,D.O Akande and E.O Ogunti “matlab based teaching tools for microstrip patch antenna design”,journal of telecommunication, VOL.7,issue 2,  MARCH 2011.

6. Prof.P.J.B clarricoats et.al , handbook of microstrip antennas IEE electromagnetic wave series 28 ,published by peter peregrinus ltd ,london united kingdom

7. Ramesh garg et.al ,microstrip antenna design handbook, publisher Artech house Boston London

8. D.G. Fang ,Antenna Theory and Microstrip Antennas , CRC press Taylor and francis Group

Boca Raton london new york

THANK YOU