Analysis of coding metasurfaces for incident radiation at oblique incidence angles

Kappa, Jan; Dang, Zinching; Sokoluk, Dominik; Rahm, Marco

doi:10.1364/osac.2.002172

Cited by 6 publications

(3 citation statements)

References 22 publications

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“…The mechanism of edge scattering is complex, 19–21 in which the scattering of surface waves (SWs) is one of the important factors. Typically, the false edge consisting of soft and hard electromagnetic surfaces 22,23 and coding metasurfaces 24–26 are adopted to reduce the edge scattering through the modulating of SWs. As SWs control metasurface, the soft and hard surfaces have their own special characteristics 27,28 .…”

Section: Introductionmentioning

confidence: 99%

Design of soft and hard composite patterns for electromagnetic scattering controlling at both normal and grazing incidence

Liu

et al. 2022

Micro & Optical Tech Letters

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In this paper, the soft and hard composite patterns for electromagnetic scattering control at both normal and grazing incident angle is proposed. The soft and hard parts are composed of dielectric substrate sandwiched by transverse or longitude metal strips with metal via and the perfect electrical conductor ground, and these two parts are combined at a certain inclination angled to form the soft and hard composite patterns. The simulation results demonstrate that the proposed composite patterns have the monostatic radar cross‐section (RCS) reduction of 20.79 and 18.36 dB at 11.24 GHz under normal incidence for transverse electric polarization and transverse magnetic polarization, respectively. Also, this structure achieves 2.78 and 5.43 dB monostatic RCS reduction under grazing incidence from 60° to 90°. The simulation results are in good agreement with the experimental ones. The physical mechanisms of the proposed composite patterns can be elucidated by the equivalent impedance method based on its near‐field distribution. The proposed composite patterns can be functionalized by changing the electromagnetic parameters of the soft and hard surfaces, which has a great potential to be used as the traveling wave antenna enclosure for scattering control.

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Section: Introductionmentioning

confidence: 99%

Design of soft and hard composite patterns for electromagnetic scattering controlling at both normal and grazing incidence

Liu

et al. 2022

Micro & Optical Tech 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.…”

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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“…Edge scattering can be suppressed by the design of the geometry and material property [4]. From the perspective of geometric design, Ufimtsev proposed a principle of using geometrical shape to minimize the back-scattering [5].…”

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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Analysis of coding metasurfaces for incident radiation at oblique incidence angles

Cited by 6 publications

References 22 publications

Design of soft and hard composite patterns for electromagnetic scattering controlling at both normal and grazing incidence

Design of soft and hard composite patterns for electromagnetic scattering controlling at both normal and grazing incidence

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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