Scattering from bodies coated with metamaterial using FDFD method

Zainud-Deen, S.H.; Botros, A.Z.; Ibrahim, Mourad S.

doi:10.1109/nrsc.2008.4542309

Cited by 21 publications

(24 citation statements)

References 12 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…They are also called the double-negative (DNG) materials or lefthanded materials because the electric field, the magnetic field and the wave vector of an EM wave propagating in such a medium form a left-handed triplet [1][2][3][4][5][6][7]. In addition to the DNG materials, another metamaterial called the single-negative (SNG) material in which only one of the material parameters is negative deserve special attention.…”

Section: Introductionmentioning

confidence: 99%

Photonic Transmission Spectra in One-Dimensional Fibonacci Multilayer Structures Containing Single-Negative Metamaterials

Rahimi¹,

Namdar²,

Entezar³

et al. 2010

PIER

View full text Add to dashboard Cite

Abstract-We investigate the transmission properties of the Fibonacci quasiperiodic layered structures consisting of a pair of double positive (DPS), epsilon-negative (ENG) or/and mu-negative (MNG) materials. It is found that there exist the polarization-dependent transmission gaps which are invariant with a change of scaling and insensitive to incident angles. Analytical methods based on transfer matrices and effective medium theory have been used to explain the properties of transmission gaps of DPS-MNG, DPS-ENG and ENG-MNG Fibonacci multilayer structures.

show abstract

Section: Introductionmentioning

confidence: 99%

Photonic Transmission Spectra in One-Dimensional Fibonacci Multilayer Structures Containing Single-Negative Metamaterials

Rahimi¹,

Namdar²,

Entezar³

et al. 2010

PIER

View full text Add to dashboard Cite

show abstract

“…Following, our research focuses on placing a dielectric layer consisting of left handed material on the surface of the human head model for further focusing improvement [20][21][22][23][24][25][26][27][28]. The scenarios which are examined are when the centre of the head model is set at the first focal point while the sources are kept still on the other focal point (case 1) and when the head model is placed in various positions inside the ellipse (case 2), (case 3).…”

Section: The Head Model Is Covered By a Dielectric Layer Consisting Omentioning

confidence: 99%

Electromagnetic Analysis of a Non Invasive Microwave Radiometry Imaging System Emphasizing on the Focusing Sensitivity Optimization

Giamalaki¹,

Karanasiou²,

Uzunoglu

2009

PIER

View full text Add to dashboard Cite

Abstract-A Green's function based methodology has been developed and implemented with the view to optimize the focusing properties and thus the performance of a Microwave Radiometry Imaging System (MiRaIS). The system consists of an ellipsoidal conductive wall cavity and a sensitive radiometric receiver and its operation principal is based on the convergence of the radiation from one focal point, where the subject or phantom is placed, on the other, where the receiver antenna is positioned. A two-layered cylinder is used to model the human head with the semi-analytical Green's function technique. The imaging configuration is enhanced by different matching structures of various materials which are placed on the surface of both the human head model and the antenna inside the ellipsoidal. Numerical code executions have been realized and the results for the electric field distribution inside the head are presented for materials of various dielectric properties and for left handed materials at two different frequencies (0.5 GHz and 1.0 GHz). Increased sensitivity of the system focusing properties is observed using particular matching structures.

show abstract

“…Here we are applying this concept to circular structures in order to obtain analytic series solution, while in other cases it will not be possible to analyze without numerical solutions for surface integral equations. Tremendous work was done to study the electromagnetic scattering from conducting cylinders with coating materials and can be found in literature [31][32][33][34][35][36][37][38][39][40]. The objective of this paper is to study the scattering from a conducting cylinder coated with a metamaterials layer and loaded with conducting helical strips by using the ASBC.…”

Section: Introductionmentioning

confidence: 99%

Electromagnetic Scattering From Conducting Circular Cylinder Coated by Meta-Materials and Loaded With Helical Strips Under Oblique Incidence

Hady¹,

Kishk²

2008

PIER B

View full text Add to dashboard Cite

Abstract-The asymptotic strip boundary condition (ASBC) isapplied to analyze the solution of the electromagnetic scattering from a conducting cylinder coated with a homogeneous linear material layer and loaded with conducting helical strips. Such homogeneous material layer can be implemented by a conventional dielectric material, a single negative (SNG) or double negative (DNG) meta-material layer. A study of different materials' constitutive parameters is presented with accordance to Drude and Lorentz material modeling. The boundary condition assumes that the strips are rounded around the coated cylinder in a helical form and both the strip's period and the spacing between the helix turns are very small and mathematically approaching the zero. Scattering due to normal and oblique incident plane waves (θ i , φ i ) of arbitrary polarization using the series solution is also computed. A number of parametric studies were investigated to illustrate the advantages of using metamaterials compared with conventional coating materials in terms of strip's rounding pitch angle and coating layer electrical thickness variations. It is also shown that for SNG materials, modified Bessel functions are used to accept negative arguments. Coating with metamaterials proves to achieve higher forward scattering compared with conventional materials for the same electrical coating thickness.

show abstract

Scattering from bodies coated with metamaterial using FDFD method

Cited by 21 publications

References 12 publications

Photonic Transmission Spectra in One-Dimensional Fibonacci Multilayer Structures Containing Single-Negative Metamaterials

Photonic Transmission Spectra in One-Dimensional Fibonacci Multilayer Structures Containing Single-Negative Metamaterials

Electromagnetic Analysis of a Non Invasive Microwave Radiometry Imaging System Emphasizing on the Focusing Sensitivity Optimization

Electromagnetic Scattering From Conducting Circular Cylinder Coated by Meta-Materials and Loaded With Helical Strips Under Oblique Incidence

Contact Info

Product

Resources

About