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research point presentation
Transcript of research point presentation
Eng. Amany Mohamed Saleh
•Studying electromagnetic properties of new artificial material.
•Studying the possibility of designing new artificial materials which have new features in different electromagnetic wave applications like antennas, passive microwave circuits and electromagnetic absorbers.
1. Averaged Transition Conditions for Electromagnetic Fields at a Metafilm .
Prof. Dr. Ahmed Attiya.
Dr. Ayman Ragab.
Basic of electromagnetic theory.
Time plan .
INDUCED DIPOLE MOMENT AND THE
2. Reﬂection and Transmission Properties of a Metaﬁlm: With an Application to a Controllable Surface Composed of Resonant Particles .
 E. F. Kuester, M. A. Mohamed, M. Piket-May, and C. L. Holloway, “Averaged transition conditions for electromagnetic fields at a metafilm,” IEEE Trans. Antennas Propagat., vol. 51, no. 10, pp. 2641–2651, Oct. 2003.
 C. L. Holloway, M. A. Mohamed, E. F. Kuester, and A. Dienstfrey, “Reflection and transmission properties of a metafilm: With an application to a controllable surface composed of resonant particles,” IEEE Trans. Electromagn. Compat., vol. 47, no. 4, pp. 853–865, Nov. 2005.
 Holloway, C. L.; Love, D. C.; Kuester, E. F.; Gordon, J. A.; Hill, D. A., "Use of Generalized Sheet Transition Conditions to Model Guided Waves on Metasurfaces/Metafilms," Antennas and Propagation, IEEE Transactions on , vol.60, no.11, pp.5173,5186, Nov. 2012
 Minatti, G.; Sabbadini, M.; Maci, S., "Surface to leaky wave transformation in polarized metasurfaces," Electromagnetic Theory (EMTS), Proceedings of 2013 URSI International Symposium on , vol., no., pp.298,301, 20-24 May 2013
 Ortiz, J.D.; Baena, J.D.; Losada, V.; Medina, F.; Marques, R.; Quijano, J.L.A., "Self-Complementary Metasurface for Designing Narrow Band Pass/Stop Filters," Microwave and Wireless Components Letters, IEEE , vol.23, no.6, pp.291,293, June 2013
 Hou-Tong Chen, "Interference theory of metamaterial perfect absorbers," Opt. Express 20, 7165-7172 (2012)
 C.L. Holloway, Edward F. Kuester, J.A. Gordon, J. O'Hara, Booth, D.R. Smith, "An Overview of the Theory and Applications of Metasurfaces: The Two-Dimensional Equivalents of Metamaterials," IEEE Antennas and Propagation Magazine, vol.54, no.2, pp. 10:35, April 2012
 Monti, A.; Soric, J.; Alu, A.; Bilotti, F.; Toscano, A.; Vegni, L., "Overcoming Mutual Blockage Between Neighboring Dipole Antennas Using a Low-Profile Patterned Metasurface," Antennas and Wireless Propagation Letters, IEEE , vol.11, no., pp.1414,1417, 2012
 Dimitriadis, A.I.; Sounas, D.L.; Kantartzis, N.V.; Caloz, C.; Tsiboukis, T.D., "Surface Susceptibility Bianisotropic Matrix Model for Periodic Metasurfaces of Uniaxially Mono-Anisotropic Scatterers Under Oblique TE-Wave Incidence," Antennas and Propagation, IEEE Transactions on , vol.60, no.12,
pp.5753,5767, Dec. 2012
 Sounas, D.L.; Kodera, T.; Caloz, C., "Electromagnetic Modeling of a Magnetless Nonreciprocal Gyrotropic Metasurface," Antennas and Propagation, IEEE Transactions on , vol.61, no.1, pp.221,231, Jan. 2013
research point presentation
types of Metasurfaces
Negative index material
Positive index material
Single positive material
Bi_isotropic and Bi_anisotropic material
Review of basic electromagnetic problems like electric polarizability, magnetic polarizability, boundary conditions, …. etc. Review of basic antenna problems and antenna types. Review of basic microwave passive circuits
Analysis of Generalized Sheet Transition conditions for metasurfaces and using them to obtain electromagnetic properties like reflection, transmission and guided waves
Verifying the analysis of GSTCs by using numerical CAD simulation
Analysis and design of simple conventional antenna structures (like microstrip antenna, horn antenna, or any other antenna) by using simulation CAD
Studying the possibility of improving properties of simple antenna structures by using metasurfaces
Experimental verification of improved antenna structure by using metasurface
Analysis and design of simple conventional passive microwave circuits (like filter, resonator, or any other passive microwave circuit) by using simulation CAD
Studying the possibility of improving properties of a simple passive microwave circuit by using metasurfaces
Experimental verification of improved passive microwave circuit by using metasurface
Preparing final seminal presentation
time (month )
The light emitted or scattered from an object includes not only propagating waves but also evanescent waves, which carry the subwavelength detail of the object.
If a lens made of NIM is placed close to an object, the near-field evanescent waves can be strongly enhanced across the lens.
Metamaterials direct and control the propagation and transmission of specified parts of the light spectrum and demonstrate the potential to render an object seemingly invisible.
Incident waves are guided around them without being affected by the object itself.
Single negative material
Metasurfaces have the advantage of taking up less physical space than do full three-dimensional metamaterial structures; consequently, metasurfaces offer the possibility of less-lossy structures.
Generalized sheet transition condition
Effective surface polarizability.
Boundary condition in terms of polarizability dyadics
Effective surface polarizability(cont.)
Reﬂection and Transmission Properties of a Metaﬁlm:
In this paper , the GSTC is used to calculate the reflection and transmission coefficients of the metafilm.
It’s show that the reflection and transmission properties of the metafilm are expressed in terms of the electric and magnetic polarizabilities of the scatters themselves, and we derive conditions of the polarizabilities of the scatters required to obtain total transmission and/or total reflection.
TE Incident plane wave on a Metafilm.
Condition for total reflection and total transmission in TE.
TM Incident plane wave on a Metafilm.
Condition for total reflection and total transmission in TM.
Example on transmission and reflection
Example on transmission and reflection (cont.)