Engineering and Physical Sciences Research Council (EPSRC) QUEST Programme Grant: Outcome and Impact

Transcription

1 Engineering and Physical Sciences Research Council (EPSRC) QUEST Programme Grant: Outcome and Impact Yang Hao School of Electronic Engineering and Computer Science

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3 Aperture Antennas

4 UWB Antennas

5 Lens Antennas

6 From Lens and Reflectors to Integrated Antennas Arrays Printed circuit antenna array with 35GHz FMCW module (Quin Star Technology, Inc.) Reflectors Automotive radar antenna at 77GHz (Toyota) Lenses Cassegrain reflector antenna GHz (Millitech, Inc.) High resolution dual fan-beam antenna 94GHz (Q-par Angus Ltd.) Gaussian optics lens antenna GHz (Millitech, Inc.)

7 Antenna Engineering Requirements Zero thickness/size, infinite gain and bandwidth, 360 degree scanning

8 Constrains to Classic Antennas

9 Constrains to Microwave Absorbers CR Brewitt-Taylor, Fundamental Limitation on the Performance of Chiral Radar Absorbing Materials, International Conference on Electromagnetics of Complex Media, Lisbon, Portugal on Sept Source: Google Images from BBC, Qinetiq etc.

10 Constrains to Antenna Arrays Source: Google The above results provide a tradeoff between thickness, scan range, and the possible bandwidth of multiple frequency bands. B. L. G. Jonsson, C. I. Kolitsidas, and N. Hussain, Array Antenna Limitations, IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS, VOL. 12, Jonathan Doane, Wideband Low-Prole Antenna Arrays: Fundamental Limits and Practical Implementations PhD Dissertation, 2013.,

11 Antenna Engineering Requirements Zero thickness/size, infinite gain and bandwidth, 360 degree scanning Increase the Frequency of Operation Advanced Materials Fully Integrated Solutions Multi-functions Smart Materials

12 An EPSRC Funded QUEST Project It stands for The Quest for Ultimate Electromagnetics using Spatial Transformations ; A 5M 5-Year EPSRC Programme Grant starting in July 2011; The QUEST brings together a new grouping of leading UK experimentalists and theorists from physics, materials science and electronic engineering to work together on the exciting opportunities and challenges emerging in the area of spatial transformations (STs) and electromagnetism (EM)

13 Modelling Challenges: Mapping New Physics into Engineering Applications Bare PEC object Cloaked PEC object

14 SP1: Concepts Non-Euclidean Cloaking Perfect Imaging Speculative Ideas SP2: Modelling tool kits Model Tools for volumetric and Surface QUEST Devices Refine Effective Medium Modelling Tools Nano-scale and Superconducting Material Modelling Tools SP3: Materials Manufacturing and Testing

15 Exeter-SP4 Experimental Physics, QUEST Devices Demo St Andrews-SP1 QUEST Theory Functional Materials, QUEST Device Fab Oxford-SP3 QUEST Antennas, EM Modelling QMUL-SP2

16 Metamaterial Antennas: Performance Enhancement from TO Luneburg lens is a gradient index lens: Luneburg lens ε(r) = 2 r2 R 2 Analytical Tranformation Optics / Electromagnetics can be applied to reduce its complexity or size. ( δx' ) 2 + ε' = 2 2 R y' 2 δ 0 0 1/ δ Slim elliptical Luneburg lens A. Demetriadou and Y. Hao, Slim Luneburg lens for antenna applications, Opt. Express, Vol. 19, No. 21, pp: (2011).

17 Metamaterial Antennas: Performance Enhancement from TO Aim Use the transformation lens as a super-strate to compensate the phase difference of the rays (θ > 0) radiated by the source Starting from the Luneburg lens ε( r) = 2 r R 2 2 Permittivity distribution Mateo-Segura C, Dyke A, Dyke H, Haq S, Hao Y. Flat Luneburg Lens via Transformation Optics for Directive Antenna Applications. IEEE Transactions on Antennas and Propagation, Volume:62, Issue:

18 Metamaterial Antennas: Performance Enhancement from TO

19 Metamaterial Antennas: Performance Enhancement from TO

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23 Overall Impact of Research QUEST has enabled a change of research culture so that, by working together more effectively, new opportunities for research could be identified, seized and exploited:

24 More than 20 publications to date in high impact journals, including three in Scientific Reports and one in Nature Photonics Journal Papers

25 QUEST organised 2012 IET Seminar on Transformation Optics (7 speakers, 10 posters) 2014 Royal Society Scientific Discussion Meeting (14 speakers, 18 posters) Conferences and Keynotes QUEST output 6 keynotes 4 special sessions More than 25 papers (presentations and posters)

26 News releases and public engagement Public engagement Royal Society Summer Exhibition 2011: Geometry and Light the science of invisibility British Science Festival 2011 (Dr Claire Dancer, then of Oxford)

27 QUEST has closely worked with UK industries and some projects were awarded with BAE Chairman s Silver Award; QUEST research has led to Exeter CDT funding; EPSRC AOTOMAT (QMUL, Oxford, Birmingham) Innovative UK funding on HARNET led by Thales UK; Two spinouts from QMUL and Oxford, respectively; IET AF Harvey Research Prize Research Impact

28 Conclusions The new concept of Metamaterials and Transformation Electromagnetics has accelerated the development of new devices in antenna and microwave engineering; Involvement from material scientists will lead to ultimate engineering innovation and huge economic impact; Future studies in metamaterials will include more exotic materials such as gain media, nanomaterials such as CNTs and Graphene etc. The research should be more multi-disciplinary driven, and, therefore, require critical mass in research for enhanced visibility.

29 Engineering and Physical Sciences Research Council (EPSRC) QUEST Programme Grant: Outcome and Impact Yang Hao School of Electronic Engineering and Computer Science