COMBINATION OF MLS , GA &amp; CG FOR THE REDUCTION OF RCS OF MULTILAYERED CYLINDRICAL STRUCTURES COMPOSED OF DISPERSIVE METAMATERIALS

Oraizi, Homayoon; Abdolali, Ali

doi:10.2528/pierb07120803

Cited by 44 publications

(30 citation statements)

References 22 publications

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“…In recent years, left-handed metamaterial (LHM), which possesses simultaneously negative permittivity and permeability, has attracted much attention because of its exotic electromagnetic properties and the potential applications [1][2][3][4][20][21][22][23][24][25][26][27][28][29][30]. In 2003, the behavior of wave propagation in media of which not all the principal elements of the permeability and permittivity tensors have the same sign is investigated [5].…”

Section: Introductionmentioning

confidence: 99%

Transition Behavior of K-Surface: From Hyperbola to Ellipse

Qiao¹,

Zheng²,

Zhang³

et al. 2008

PIER

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Abstract-The transition behavior of the k-surface of a lossy anisotropic indefinite slab is investigated. It is found that, if the material loss is taken into account, the k-surface does not show a sudden change from hyperbola to the ellipse when one principle element of the permittivity tensor changes from negative to positive. In fact, after introducing a small material loss, the shape of the k-surface can be a combination of a hyperbola and an ellipse, and a selective high directional transmission can be obtained in such a slab.

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Section: Introductionmentioning

confidence: 99%

Transition Behavior of K-Surface: From Hyperbola to Ellipse

Qiao¹,

Zheng²,

Zhang³

et al. 2008

PIER

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“…We use the method of least squares [36] to determine the dispersion parameters f ep , γ e , f mp , f mo , γ m to achieve the specifications in Eq. (26). The frequency bandwidth is divided into n intervals and the error function is minimized to determine the …”

Section: Optimum Design Of a Two Layer Dzr Ram Coating In The X Band mentioning

confidence: 99%

“…We use the full-wave matrix method for the analysis of this structure [15][16][17][18] and present several examples of plane wave incidence on it [19][20][21]. Subsequently, we study the applicability of DZR metamaterials for the fabrication of radar absorbing materials (RAMs) for the reduction of radar cross section (RCS) of various objects [22][23][24][25][26][27], coating the interior walls and objects inside anechoic chambers, design of antennas with low side lobe levels and protection against electromagnetic interference in high speed circuits. RAMs may be designed for operation at a single frequency or in a narrow frequency band width, which may be straightforward.…”

Section: Introductionmentioning

confidence: 99%

Application of Double Zero Metamaterials as Radar Absorbing Materials for the Reduction of Radar Cross Section

Oraizi¹,

Abdolali²,

Vaseghi³

2010

PIER

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Abstract-We introduce and investigate the applications of double zero (DZR) metamaterials (having the real parts of permittivity and permeability equal to zero) as radar absorbing materials (RAMs). We consider a perfectly electric conductor (PEC) plate covered by several layers of DZR metamaterial coatings under an oblique plane wave incidence of arbitrary polarization. Several analytical formulas are derived for the realization of zero reflection from such structures. The angle of reflection in the DZR metamaterials becomes complex, which leads to the dissociation of the constant amplitude and equiphase planes. Then several examples of the applications of DZR metamaterials (in nondispersive and dispersive conditions) as RAMs and zero reflection coatings are provided. The characteristics and parameters of the DZR metamaterial media are determined in each case. The method of least squares is used to optimize the DZR coatings for the minimization of reflected power, which uses the combination of genetic algorithm and conjugate gradient method (GA-CG) to benefit from their advantages and avert their short comings.

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“…In addition, the potential application of metamaterials in stealth technology also becomes a hot topic of current research [17][18][19][20], where RCS [21][22][23][24] is the main consideration in the design of military platforms. There are two different solutions proposed for RCS reduction using metamaterials: cloaking devices [25] and metamaterial absorber.…”

Section: Introductionmentioning

confidence: 99%

Reduction of Radar Cross Section Based on a Metasurface

Chen¹,

Cheng

Zhao³

et al. 2014

PIER

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Abstract-A metasurface for Radar Cross Section (RCS) reduction is proposed. The surface is composed of the same type of metamaterial units with different geometric dimensions, leading to various reflection phases under the incidence of plane waves. By carefully choosing the phase distributions, diffusion will be produced for the reflected waves which may redistribute the scattering energy from the surface toward all the directions, and hence it can be applied as the coating of metallic targets with ultra-low RCS. Both the simulated and experimental results have validated the proposed method.

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COMBINATION OF MLS , GA & CG FOR THE REDUCTION OF RCS OF MULTILAYERED CYLINDRICAL STRUCTURES COMPOSED OF DISPERSIVE METAMATERIALS

Cited by 44 publications

References 22 publications

Transition Behavior of K-Surface: From Hyperbola to Ellipse

Transition Behavior of K-Surface: From Hyperbola to Ellipse

Application of Double Zero Metamaterials as Radar Absorbing Materials for the Reduction of Radar Cross Section

Reduction of Radar Cross Section Based on a Metasurface

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