Performance enhancement of RF absorbers by using resistively-loaded periodic screens

Zhou, Yuda; Mittra, R.

doi:10.1109/aps.2012.6348087

Cited by 3 publications

(3 citation statements)

References 5 publications

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“…In recent years FSS-based absorbers have drawn the attention of a number of researchers [1,2]. Such absorbers are typically realized in two different ways by using (i) lossy FSSs, with varying sheet resistance; and unit cells with perfectly conducting strips with resistive inserts.…”

Section: Introductionmentioning

confidence: 99%

Performance enhancement of a dual-loop FSS-based absorber

Zhou

Mittra

2014

2014 IEEE Antennas and Propagation Society International Symposium (APSURSI)

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Section: Introductionmentioning

confidence: 99%

Performance enhancement of a dual-loop FSS-based absorber

Zhou

Mittra

2014

2014 IEEE Antennas and Propagation Society International Symposium (APSURSI)

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“…The FSS structures can be tailored to enhance the absorption in target frequency bands [34] or to broaden the working bandwidth [33,35] of the initial layered absorber.…”

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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“…The FSS structures can be tailored to enhance the absorbance in target frequency bands [30] or to broaden the working bandwidth [29] of the initial layered absorber.…”

Section: Reduction Of Radio Frequency Interference (Rfi)mentioning

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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Performance enhancement of RF absorbers by using resistively-loaded periodic screens

Cited by 3 publications

References 5 publications

Performance enhancement of a dual-loop FSS-based absorber

Performance enhancement of a dual-loop FSS-based absorber

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

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