Electromagnetic metamorphosis: Reshaping scatterers via conformal anisotropic metamaterial coatings

Özgün, Özlem; Kuzuoğlu, Mustafa

doi:10.1002/mop.22784

Cited by 64 publications

(29 citation statements)

References 7 publications

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“…We hasten to point out, however, that this type of performance is perfectly well suited for modern radar systems, symbolically depicted in Figure 13, where only the scattering in the reflection region is of concern [36][37][38].…”

Section: Rcs Reduction For Practical Targets By Using a Modification mentioning

confidence: 99%

DESIGN OF ABSORPTIVE COATINGS FOR ARBITRARILY SHAPED TARGETS FOR REDUCTION OF RADAR CROSS SECTION (RCS) USING AN ALTERNATIVE TO THE TRANSFORMATION OPTICS (TO) ALGORITHM (Invited Paper)

Mittra¹,

Zhou²

2014

PIER

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Abstract-In this paper we present an alternative approach to addressing the problem of scattering reduction for radar targets, which have recently been dealt with by using the Transformation Optics (TO) algorithm which typically calls for the use of Metamaterials (MTMs) that are inherently narrowband, dispersive and highly sensitive to polarization as well as to the incident angle. The present design utilizes realistic lossy materials that can be conveniently fabricated in the laboratory, and are wideband as well as relatively insensitive to polarization and incident angle of the incoming wave. A modified interpretation of the TO algorithm is presented and is employed the design of RCS-reducing absorbers for arbitrarily shaped targets, and not just for canonical shapes, e.g., cylinders, for which cloaks have been designed by using the TO. The paper also briefly examines the topic of performance enhancement of absorbers by using graphene materials and embedded Frequency Structure Surfaces (FSSs). We begin by presenting the design procedure for planar absorbers, and then examine how well those designs perform for arbitrarily-shaped objects. Finally, we discuss how the planar design can be modified by tailoring the material parameters of the coating for specific object shapes. A number of test cases are included as examples to illustrate the application of the proposed design methodology, which is a modification of the classical TO paradigm.

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Section: Rcs Reduction For Practical Targets By Using a Modification mentioning

confidence: 99%

DESIGN OF ABSORPTIVE COATINGS FOR ARBITRARILY SHAPED TARGETS FOR REDUCTION OF RADAR CROSS SECTION (RCS) USING AN ALTERNATIVE TO THE TRANSFORMATION OPTICS (TO) ALGORITHM (Invited Paper)

Mittra¹,

Zhou²

2014

PIER

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“…A number of examples have been included to illustrate the performances achieved by the absorbing blankets designed by using the developed technique. The interested reader may refer to the publications appearing in [31][32][33][34][35] for related information on the topic discussed in this work.…”

Section: ⅳ Conclusionmentioning

confidence: 99%

Application of Transformation Electromagnetics to Cloak Design and Reduction of Radar Cross Section

Mittra¹,

Zhou²

2013

Journal of electromagnetic engineering and science

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In this paper we present an alternative approach to addressing the problem of designing cloaks for radar targets, which have been dealt with in the past by using the transformation optics (TO) algorithm. The present design utilizes realistic materials, which can be fabricated in the laboratory, and are wideband as well as relatively insensitive to polarization and incident angle of the incoming wave. The design strategy, presented herein, circumvents the need to use metamaterials for cloak designs that are inherently narrowband, dispersive and highly sensitive to polarization and incident angle. A new interpretation of the TO algorithm is presented and is employed for the design of radar cross section-reducing absorbers for arbitrary targets, and not just for canonical shapes, e.g., cylinders. The topic of performance enhancement of the absorbers by using graphene materials and embedded frequency structure surfaces is briefly mentioned. The design procedure for planar absorbing covers is presented and their performance as wrappers of general objects is discussed. A number of test cases are included as examples to illustrate the application of the proposed design methodology, which is a modification of the classical TO paradigm.

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“…From these equations, both TE and TM waves coexist inside the ellipsoidal cloak. Note for arbitrarily-shaped cloaks we could see that the mathematics would be a little more complicated [26], due to the complexity of the descriptions on the geometries of the shapes.…”

Section: Field Transformation For Arbitarily-shaped 3d Cloaksmentioning

confidence: 99%

“…If a cylindrical region is compressed into a cylindrical shell, one will obtain an ideal two-dimensional (2D) cloak and the object inside the cylindrical shell will become invisible [1]. A number of 2D cloaks with different shapes have been proposed due to various application environments [2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][21][22][23][24][25][26][27][28].…”

Section: Introductionmentioning

confidence: 99%

Investigations of the Electromagnetic Properties of Three-Dimensional Arbitrarily-Shaped Cloaks

Cheng¹,

Jiang²,

Cui³

2009

PIER

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Abstract-We investigate the electromagnetic properties of threedimensional (3D) arbitrarily-shaped invisible cloaks based on the analytical field transformation theory instead of the complicated numerical simulations. Very simple closed-form expressions for fields and energy flows have been derived for arbitrarily-shaped 3D cloak, which could help us to investigate the electromagnetic properties of the 3D cloaks rapidly and efficiently. The difference between 2D and 3D cloaks have been compared in detail. Distributions of the fields, power flows and wave polarizations for the 3D case have been discussed inside the cloak. Numerical results have been presented at the cutplanes of cloaks to valid the theoretical analysis, which shows clearly how the incident waves are bent at the inner boundary. In order to further reveal the physical essence of the cloaks, both 3D spherical and ellipsoidal cloaks have been considered based on the analytical method. The common features and the differences for the two structures have been also illustrated in this paper.

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Electromagnetic metamorphosis: Reshaping scatterers via conformal anisotropic metamaterial coatings

Cited by 64 publications

References 7 publications

DESIGN OF ABSORPTIVE COATINGS FOR ARBITRARILY SHAPED TARGETS FOR REDUCTION OF RADAR CROSS SECTION (RCS) USING AN ALTERNATIVE TO THE TRANSFORMATION OPTICS (TO) ALGORITHM (Invited Paper)

DESIGN OF ABSORPTIVE COATINGS FOR ARBITRARILY SHAPED TARGETS FOR REDUCTION OF RADAR CROSS SECTION (RCS) USING AN ALTERNATIVE TO THE TRANSFORMATION OPTICS (TO) ALGORITHM (Invited Paper)

Application of Transformation Electromagnetics to Cloak Design and Reduction of Radar Cross Section

Investigations of the Electromagnetic Properties of Three-Dimensional Arbitrarily-Shaped Cloaks

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