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By: A.Arjun(457)

D.Pavan(448)

V.Karthik(451)

COPLANAR MICRO-STRIP

ANTENNA

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Index Introduction Micro strip antenna(actual)

Coplanar micro strip antenna

common shapes of microstrip patch elements

Feeding & patch we use CST studio suite

Coplanar square &circular micro strip antennas

1. Variation of Return loss versus Frequency(at 10.7 Ghz)

2. Radiation pattern

3. Far-Field Radiation Pattern

Advantages

Disadvantages

conclusion1.

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INTRODUCTION

The project includes the designing of a square &circular coplanar micro-strip antenna at X-band

.Actual micro-strip antennas have more radiation to

reduce that we will fabricate a PEC metal around

patch which acts as a ground such that radiationreduces. Keeping such ground makes the actual

micro-strip antenna a coplanar.

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Micro strip antenna(actual)

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Coplanar micro strip antenna

Its called a coplanar as the patch is covered

with pec metal around it

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Common Shapes of microstrip

patch elements

mircro strip antennas may of different shapes andthese are the examples

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Feeding & patch we use:

Generally the feeding may b of two types

1)strip line feeding.

2)probe feeding.

Here in coplanar micro-strip antennas we use strip line

feeding.

The patches are the square and circular coplanar

micro-strip antennas.

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CST studio suite :

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Coplanar square micro strip

antenna

Dielectric

constant2.2

-

Thickness

(h)(substrate)

31 Mill

Operating

frequency10.7 GHz

LengthL(patch)

8.99 Mm

Strip

line1.3 Mm

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Variation of Return loss versus

Frequency(at 10.7 Ghz)

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Radiation pattern

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Far-Field Radiation Pattern

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Coplanar Circular micro strip

antenna

PARAMETRS

DIMENSION

UNIT

Dielectric

constant2.2 -

Thickness(h)(substr

ate)

31 mill

Operating

frequency

10.7 GHz

Length

L(patch)8.99 Mm

Strip line 1.3 Mm

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Frequency

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Radiation pattern

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Far-Field Radiation Pattern

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Advantages

Light weight and low volume.

Low profile planar configuration which can be easily

made conformal to host surface.

Low fabrication cost, hence can be manufactured in

large quantities.

Supports both, linear as well as circular polarization.

Can be easily integrated with microwave integrated

circuits (MICs). Capable of dual and triple frequency operations.

Mechanically robust when mounted on rigid surfaces.

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Disadvantages

Narrow bandwidth.

Low efficiency.

Low Gain.

Extraneous radiation from feeds and junctions. Poor end fire radiator except tapered slot antennas.

Low power handling capacity.

Surface wave excitation.

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Applications

Mobile and satellite communication application

Global Positioning System applications

Radio Frequency Identification (RFID)

Radar Application Medicinal applications of patch

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conclusion

The coplanar circular & square microstrip antennasdesign has been proposed and successfully

implemented. The proposed structure has been

simulated by using the CST STUDIO software. The

coplanar square microstrip antenna enhancesbandwidth, gain and good return loss (S11 parameters)

of -15dB & -22dB is achieved along with broad side

radiation pattern.

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