TE Scattering From Concaved Wedges With Longitudinal Corrugations

Lee, Wonseok; Lee, Soo-Ji; Lee, Dong Hoon; Lee, Wang‐Sang; Yu, Jong‐Won

doi:10.1109/tap.2012.2233703

Cited by 6 publications

(5 citation statements)

References 18 publications

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“…Firstly, various different geometric shapes for the purpose of minimizing backscattering have been introduced [9][10][11][12]. Secondly, from the perspective of material property design, methods to suppress edge scattering include the use of edge-groove structures [13,14] and edge coatings [15], among others, which have received significant attention. Edge scattering is an important phenomenon that can be explained as the scattering caused by the discontinuity impedance between the edge of the target object and its surrounding environment.…”

Section: Introductionmentioning

confidence: 99%

A Low RCS Design under a Large Incident Angle for the Curved Surface Edge Considering Edge Effects

2024

PIER Letters

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In the context of the backscatter problem caused by edge diffraction on metallic curved surface, this study proposes a method to mitigate the scattering effect by loading different metasurface structures in four equally divided regions along the surface edge. Based on the design of the loaded metasurface on the curved surface, the interaction between the reflection field on the surface and the diffracted field is regulated by adjusting two key parameters: the reference phase (φ0) at the edge and the phase difference (φ d ) in adjacent regions. By controlling these parameters, reduction in the monostatic radar cross-section (RCS) can be achieved when the metasurface is loaded onto the curved surface. By controlling the reflection phase of a sandwich-like unit structure subjected to oblique incidence of electromagnetic waves, a metasurface that meets the requirements has been designed. Through a comparison and analysis of the near field and monostatic radar cross-section before and after loading the metasurface, the effectiveness of this design method is confirmed. This method is of great significance to control the electromagnetic scattering caused by edge diffraction.

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Section: Introductionmentioning

confidence: 99%

A Low RCS Design under a Large Incident Angle for the Curved Surface Edge Considering Edge Effects

2024

PIER Letters

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“…The edge diffraction can be suppressed by the combination of shaping geometry and designing material property [4,5]. Methods for suppressing edge diffraction include the use of edge serration [6][7][8], edge corrugations [9], resistive tapers loading [10][11][12], and edge coatings [13,14], which have received considerable attention. Other related works have involved using the impedance surface to redirect the back-scattering, orto guide the surface waves toward or away from the hypotenuse [15,16].…”

Section: Introductionmentioning

confidence: 99%

Wideband RCS reduction of thin metallic edges mediated by spoof surface plasmon polaritons

Feng

Wang

et al. 2021

EPJ Appl. Metamat.

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The back-scattering from front edge diffraction contributes significantly to mono-static radar cross section under TE-polarization when the specular reflection of an object is eliminated by elaborate shaping. With the aim to suppress the back-scattering of thin metallic edge, we propose to achieve wideband radar cross section (RCS) reduction by integrating an absorbing structure (AS) in front of the edge. The unit cell of AS is composed of a longitudinal array of metallic strips with linearly decreasing lengths. Under TE-polarized illumination, spoof surface plasmon polariton (SSPP) can be excited with high efficiency. Due to the deep-subwavelength property of SSPP, electromagnetic waves are highly confined around the AS, leading to strong local field enhancement and hence to wideband absorption. In this way, back-scattering of the edge is suppressed and the mono-static RCS can be reduced significantly over wide band. To verify this method, we designed, fabricated and measured a prototype. The results of both simulation and measurement indicate that our proposal can significantly suppress edge scattering, whose RCS reduction more than 10 dB achieves at range of 8.8–17.8 GHz under TE polarization. This work provides a new alternative of suppressing edge diffraction and may find applications in electromagnetic compatibility, radar stealth, etc.

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“…Afterwards, there have been several different geometrical shapes that were implemented [6][7][8][9][10][11][12]. From the perspective of material property design, the methods for edge scattering suppression include the use of edge corrugations, resistive taper loading, and edge coatings, etc., which have received considerable attention [13][14][15][16][17][18][19][20][21][22][23][24]. In addition, other related works include using inhomogeneous anisotropic impedance surfaces to guide surface waves with the purpose of suppressing the scattering of the hypotenuse of triangular scatterer [25] and using hard and soft anisotropic impedance surfaces to redirect the back-scattering [26].…”

Section: Introductionmentioning

confidence: 99%

Suppressing Edge Back-Scattering of Electromagnetic Waves Using Coding Metasurface Purfle

Feng

Wang

et al. 2020

Front. Phys.

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Edge scattering is one of the main scattering sources for metal objects, especially for those with thin front edges. In this paper, based on the principle of scattering cancelation, a coding metasurface purfle is proposed and employed to suppress the edge back-scattering of electromagnetic (EM) waves. To this end, two split-ring resonators with a π phase difference between them are designed to act as the 0-and 1-element of the coding metasurface. The coding metasurface fixed on the front edge of a thin metal plate can reduce the edge back-scattering significant for EM waves polarized along the edge direction due to the anti-phase scattering of the two coding elements. Both the simulation and experiment results verify the reduced back-scattering of the flat edge. A maximal reduction of 24 dB is attained within the central frequency of about 11 GHz. This work provides a novel alternative to suppressing edge scattering and may find applications in EM compatibility, radar stealth technologies, etc.

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TE Scattering From Concaved Wedges With Longitudinal Corrugations

Cited by 6 publications

References 18 publications

A Low RCS Design under a Large Incident Angle for the Curved Surface Edge Considering Edge Effects

A Low RCS Design under a Large Incident Angle for the Curved Surface Edge Considering Edge Effects

Wideband RCS reduction of thin metallic edges mediated by spoof surface plasmon polaritons

Suppressing Edge Back-Scattering of Electromagnetic Waves Using Coding Metasurface Purfle

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