On-body Antenna Design using Carbon Nanotubes Presenter : Syed - - PowerPoint PPT Presentation
On-body Antenna Design using Carbon Nanotubes Presenter : Syed Muzahir Abbas, Ph.D. Student Supervisor : Prof. Karu Esselle Centre for Electromagnetic and Antenna Engineering (CELANE) Department of Engineering 1/28 Presentation Outline
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Centre for Electromagnetic and Antenna Engineering (CELANE) Department of Engineering
Presenter: Syed Muzahir Abbas, Ph.D. Student Supervisor: Prof. Karu Esselle
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– Antennas – CNT – CNT Yarns – Body Centric Communication – On-body Antennas
– On-body Antenna Design Requirements – Design Constraints/Aims & Objective – Expected Outcomes
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– Antennas – CNT – CNT Yarns – Body Centric Communication – On-body Antennas
– On-body Antenna Design Requirements – Design Constraints/Aims & Objective – Expected Outcomes
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“Usually a metallic device (as a rod or wire) for radiating or receiving radio waves”. (Webster’s dictionary) OR “A means for radiating or receiving radio waves”. (IEEE Standard)
– Antenna Impendence – Efficiency – Radiation Pattern – Antenna Gain – Directivity – Antenna Polarization – Bandwidth – Return Loss
[1] C. A. Balanis, Antenna Theory: Analysis and Design: John Wiley, 2005.
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conventional metals
– Density of CNT composites is about five time lower than copper and around half that of aluminium. – Thermal conductivity is about ten times that of copper
– Mechanical (high strength and load bearing) – Electrical (conductivity and resistivity) – Thermal (sustain at high temperatures) – Non-oxidizing abilities
– Nanoantennas – Nanoelectronics
nanostructure
* http://chem-guide.blogspot.com.au/2010/04/covalent-solid.html
Graphene
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– Single-Walled Carbon Nanotube (SWCNT)
graphene, which is rolled into a seamless cylinder
– Multi-Walled Carbon Nanotube (MWCNT)
layers) of graphene. OR
*http://staff.aist.go.jp/h-kataura/Kogaku-kiji-forweb.htm
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* http://explow.com/buckypaper http://www.phy.mtu.edu/yap/frontiercarbon.html
a b c d
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– Polymer-carbon nanotube sheets for conformal load bearing antennas. – Presented circuit model to calculate CNT sheet conductivity. – Presented fabrication process.
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– Conducted mechanical tests for
[2] Z. Yijun, Y. Bayram, D. Feng, D. Liming, and J. L. Volakis, "Polymer-Carbon Nanotube Sheets for Conformal Load Bearing Antennas," Antennas and Propagation, IEEE Transactions on, vol. 58, pp. 2169-2175, 2010.
– Proposed it suitable for conformal load bearing antennas and RF circuits.
(b) (c) (a)
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– Full-Composite Fractal Antenna Using Carbon Nanotubes for Multiband Wireless Applications. – UHF-RFID (900MHz), Blutooth (2.4GHz) and WLAN (5.5GHz). – Presented antenna design and fabrication process. – Antenna gain and read range can be controlled by changing the conductivity of composite, which is not possible for materials with fixed conductivity such as copper.
[3] A. Mehdipour, I. D. Rosca, A. R. Sebak, C. W. Trueman, and S. V. Hoa, "Full-Composite Fractal Antenna Using Carbon Nanotubes for Multiband Wireless Applications," Antennas and Wireless Propagation Letters, IEEE, vol. 9, pp. 891-894, 2010.
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– Comparison of copper and CNT antennas. – Frequency range 24 - 34 GHz. – Presented antenna design and fabrication process. – Housing effect on the performance of CNT antenna is much lower than for the copper antenna – Above 30GHz its significantly less resulting in stable gain and less distortion in radiation pattern.
[4] A. Mehdipour, I. D. Rosca, A. R. Sebak, C. W. Trueman, and S.
Wave Antenna Applications," Antennas and Propagation, IEEE Transactions on, vol. 59, pp. 3572-3578, 2011. (a) (b)
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* http://www.csiro.au/Outcomes/Materials-and-Manufacturing/ Innovation/Carbon-Nanotubes-2.aspx
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– Communications from off-body to an on-body device or system
– Communications within on-body networks and wearable systems
– Communications to medical implants and sensor networks
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– Antennas – CNT – CNT Yarns – Body Centric Communication – On-body Antennas
– On-body Antenna Design Requirements – Design Constraints/Aims & Objective – Expected Outcomes
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– UWB lower band (3 - 5 GHz) – UWB (3.1 – 10.6 GHz) – V-Band (7 GHz around 60 GHz) TABLE: Unlicensed frequency bands around 60 GHz [6].
– 50 ohm
Country Japan USA Canada Korea Europe Australia Frequency Band (GHz) 59-66 57.05-64 57-64 57-64 57-64 59.4-62
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– Horizontal / Vertical
– Omni-directional and along the body surface
– To prevent radiation towards body
– Larger bandwidth
– Small/Light
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desired parameters
ground plane?
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– Antennas – CNT – CNT Yarns – Body Centric Communication – On-body Antennas
– On-body Antenna Design Requirements – Design Constraints/Aims & Objective – Expected Outcomes
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Months 1 - 6 7 - 8 9 - 11 12
Task-1, Literature Review
Mar –Aug2012
Task-2, Software Learning
Sep-Oct
Task-3, Test Structures Designing
Nov-Jan2013
Task-4, Test Structures Fabrication
Feb
Task-1, Literature Review (6-months)
– To strengthen the relevant knowledge and to gain detailed insight of existing
work carried out so far in the field under investigation – CNT, CNT yarns, Antennas, On-body communication/antennas, UWB, Human body properties Deliverables – Literature review report
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Task-2, Software Learning (2-months) – High Frequency Structure Simulator (HFSS) Completed – CST Microwave Studio In progress – AWR Microwave Office In progress Tasks To Do – Task-3, Test Structures Designing – Task-4, Test Structures Fabrication Task-1, Achieved (March 2012 to date) – CNT, CNT yarns, Antennas, On-body communication/antennas, UWB, Human body properties Deliverables – Test Structures
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Months 13 - 15 16 - 18 19 - 21 22-24
Task-5, CNT Measurements
Mar –May2013
Task-6, Antenna Designing
Jun-Aug
Task-7, Antenna Simulations
Sep-Nov
Task-8, Antenna Fabrication
Dec
Task-9, Antenna Testing
Jan-Feb2014 Deliverables – Properties of CNT yarns – Antenna prototype – Publication of results in International conferences/journals
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Months 25 - 26 27 - 36
Task-10, Results and Analysis Mar-Apr2014 Task-11, Write-up
May2014 - Feb2015 Deliverables – Publication of results in International conferences/journals – Thesis write-up – Completion of thesis in 3 years
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– Antennas – CNT – CNT Yarns – Body Centric Communication – On-body Antennas
– On-body Antenna Design Requirements – Design Constraints/Aims & Objective – Expected Outcomes
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dimensions for their usage in nanoantennas and nanoelectronics applications
weight, flexible and will have better performance characteristics
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[1]
[2]
Sheets for Conformal Load Bearing Antennas," Antennas and Propagation, IEEE Transactions on, vol. 58, pp. 2169-2175, 2010. [3]
Composite Fractal Antenna Using Carbon Nanotubes for Multiband Wireless Applications," Antennas and Wireless Propagation Letters, IEEE, vol. 9, pp. 891-894, 2010. [4]
Nanotube Composites for Wideband Millimeter-Wave Antenna Applications," Antennas and Propagation, IEEE Transactions on, vol. 59, pp. 3572-3578, 2011. [5]
communications: Artech House, 2006. [6]
for BAN applications at V band," in Antenna Technology (iWAT), 2012 IEEE International Workshop on, 2012, pp. 152-155.
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