Evaluation of Metamaterial Patch Antenna For Mobile Application

byNUR AZLIN BINTI ALWI KUTTYKET090025Supervisor : Dr. Wan Norliza Wan MahadiDate : 4 June 2013

Outline

Objectives

Introduction

Simulation

Result and Discussion

Conclusion

Future Recommendation2

OBJECTIVES

To design and evaluate rectangular patch antenna for mobile application.

To investigate the application of metamaterial for mobile communication.

To design and simulate metamaterial patch antenna.

To make the comparison between patch antenna with and without metamaterial. 3

INTRODUCTION ( 1 / 5 )

Definitions:

• Periodic materials that derive their properties from their structures and cannot be acquired in nature

• Also called left-handed metamaterial.Metamaterial

• A low profile antenna consisting of a metal layer over dielectric substrate and ground plane.

Patch Antenna

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Introduction ( 2 / 5 )

Advantages Disadvantages

• Light weight and low volume • Narrow bandwidth

• Low fabrication cost • Low efficiency

• Support linear and circular polarization

• Low gain

• Can be easily integrated with Microwave Integrated Circuit

(MICs)

• Low power handling capacity

• Capable of dual and triple frequency operations

• Extraneous radiation from feeds and junctions

• Mechanically robust when mounted on rigid surfaces

• Surface wave excitation

Advantages and Disadvantages of Patch Antenna

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Introduction ( 3 / 5 )

Parameters Dimensions Unit

Dielectric constant, 4.3 -

Loss tangent, tan ∂ 0.02 -

Operating Frequency 1.8 GHz

Thickness, h 4.5 mm

Width, W 51.19 mm

Length, L 38.64 mm

Width of Patch 25.59 mm

Length of Patch 19.32 mm

Parameters

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Introduction ( 4 / 5 )

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Microstrip Patch Antenna

Introduction ( 5 / 5 )Calculation of Patch Antenna

• The width W of the patch antenna:

• The effective dielectric constant (ԑeff) of the microstrip patch antenna:

• The actual length of patch (L) is calculated by:

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SIMULATION ( 1 / 4 )Microstrip Patch Antenna

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FR-4 (lossy)Copper

Patch Antenna Design

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Simulation ( 2 / 4 )

Simulation ( 3 / 4 )Metamaterial Patch Antenna

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Simulation ( 4 / 4 )Metamaterial Patch Antenna Design

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RESULT AND DISCUSSION ( 1 / 7 )S-Parameter for microstrip patch antenna

Return loss = -11.32 dB at 1.808 GHz

Bandwidth = 45.5 MHz13

Result and Discussion ( 2 / 7 )Polar Plot

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Result and Discussion ( 3 / 7 )

Radiation Pattern

Directivity = 6.813 dBi15

Result and Discussion ( 4 / 7 )

Radiation Pattern in 2D

Gain = 5.04 dB16

Result and Discussion ( 5 / 7 )S-Parameter for Metamaterial Patch Antenna

Return loss = -23.16 dB at 1.864 GHz

Bandwidth = 85.4 MHz17

Result and Discussion ( 6 / 7 )

Return loss = -34.28 dB at frequency 888 MHz

Bandwidth = 42.3 MHz18

Parameters Microstrip Patch Antenna

Metamaterial Patch Antenna

Resonant Frequency (GHz)

1.808 1.864 and 0.888

Return loss, S11 (dB) -11.32 -23.16 and -34.28

Bandwidth (MHz) 45.5 85.4 and 42.3

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Result and Discussion ( 7 / 7 )Comparison between patch antenna and metamaterial patch antenna

CONCLUSION

Both design patch antenna and metamaterial patch antenna have successfully simulated

Analysis shows that return loss and bandwidth have been achieved.

By using metamaterial, the return loss was improved and the structure provide wide bandwidth.

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FUTURE RECOMMENDATION

Other parameters such as gain and directivity for metamaterial patch antenna design

Use another shape of the metamaterial structure on the conventional antenna

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References

1. C.A. Balanis, Antenna Theory and Design, John Wiley & Sons, 1997.2. Kafesaki, M., Koschny, T., Penciu, R.S., Gundogdu, T.F., Economou, E.N.

and Soukoulis, C.M. (2005) Left-handed Metamaterials: Detailed Numerical Studies of the Transmission Properties. Journal of Optics A: Pure and Applied Optics 7: S12-S22.

3. D.R. Smith, W.J. Padilla, D.C. Vier, S.C. Nemat-Nasser, S. Schultz, Composite medium with simultaneously negative permeability and permittivity, Physical Review Letters, vol. 84, pp. 4184-4187, 2000.

4. Sapana Yadav, Dr. Rekha Gupta, Neelima Choudhary, Bhim Singh, “At 1.881 GHz, Rectangular Microstrip Patch Antenna Loaded using Split Rectangle Shaped of Metamaterial Structure for Bandwidth Improvement”, International Journal of Advanced Technology & Engineering Research ,Vol. 2, Issue 5, Sept. 2012.

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Question & Answer Session