m.tech thesis on micristrip antenna

8/10/2019 m.tech thesis on micristrip antenna

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MICROSTRIP ANTENNA FOR

WIDEBAND APPLICATIONS

PRESENTED BY

SHIVKANTTHAKUR

112018

P2 PRESENTATION

(M.TECH)

OF

M TECH THESIS

ON


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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


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Work done till p1

Introduction of microstrip antenna

Basic parameters

Design frequency

VSWR

Return loss

Bandwidth

Gain

Efficiency


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Description of problem statement

Microstrip antenna becomes very popular due to

light weight

low cost

Small size

Ease of integration

Main disadvantage of microstrip antenna

Narrow bandwidth

Objective

Designing a microstrip antenna for wireless LAN applications

Frequency is 2.4 GHz Bandwidth of antenna used today is 7.8% over the

frequency range of 2.33GHz to 2.52GHz


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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


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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


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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 accurate

2. 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


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Transmission line model

reff=2

1

1212

1

2

1

w

hrr 1h

w


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Continu..

8.0

264.0

258.0

3.0

412.0

h

w

h

w

h

L

reff

reff

LLLeff 2

1

2

2

rrf

cw

Lf

Lreffr

22

1

00


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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


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Calculation of feed position


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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


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L

L


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Dimension of patch

Length=38mm

Width =25mm

Thickness=1.6mm

Material chosen for substrate FR4)

r=4.4

Frequency=1.9GHz


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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


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Return loss and VSWR of L-shape slot

microstrip antenna

Return loss VSWR


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Return loss and VSWR of L-shape slot loaded

microstrip antenna


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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


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references

1. C.A.Balanis, Antenna theory Analysis & Design , 3rdedition, 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.


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Continu..

5. K.O Odeyemi,D O Akande and E O Oguntimatlab 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


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THANK YOU

m.tech thesis on micristrip antenna

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