metamaterial patch antenna
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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
4
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
5
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
9
FR-4 (lossy)Copper
Patch Antenna Design
9
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
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