RCS Reduction from Conformal Surfaces Using Plasma-Based AMC Arrays

Malhat, Hend A.; Shabayek, N. A.

doi:10.1007/s11468-020-01118-6

Cited by 22 publications

(12 citation statements)

References 13 publications

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“…For comparison, Figure 7 also shows the full-wave simulated results obtained thru CST [11]. Simulations are performed based on the Drude model in Equation ( 3), which is a popular model that describes its interaction between plasma and electromagnetic waves [8,9,12,15,16]. For comparison, Figure 7 also shows the full-wave simulated results obtained thru CST [11].…”

Section: Experimental Results and Analysismentioning

confidence: 99%

Plasma Generator with Dielectric Rim and FSS Electrode for Enhanced RCS Reduction Effect

Cho

Ahn

et al. 2021

Sensors

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In this study, a method was experimentally verified for further reducing the radar cross-section (RCS) of a two-dimensional planar target by using a dielectric rim in a dielectric barrier discharge (DBD) plasma generator using a frequency selective surface (FSS) as an electrode. By designing the frequency selective surface such that the passbands of the radar signal match, it is possible to minimize the effect of the conductor electrode, in order to maximize the RCS reduction effect due to the plasma. By designing the FSS to be independent of the polarization, the effect of RCS reduction can be insensitive to the polarization of the incoming wave. Furthermore, by introducing a dielectric rim between the FSS electrode and the target, an additional RCS reduction effect is achieved. By fabricating the proposed plasma generator, an RCS reduction effect of up to 6.4 dB in X-band was experimentally verified.

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Section: Experimental Results and Analysismentioning

confidence: 99%

Plasma Generator with Dielectric Rim and FSS Electrode for Enhanced RCS Reduction Effect

Cho

Ahn

et al. 2021

Sensors

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“…Among the various types of metasurfaces, the metasurface absorber, the coding metasurface, and the checkerboard surfaces all have outstanding performance in realizing radar cross-section (RCS) reduction and improving electromagnetic stealth performance. [21][22][23][24][25] Nowadays, the majority of devices are required to achieve electromagnetic stealth in the X-band to Ka-band to ensure radar detection and wireless communication. However, there are several drawbacks existing in absorber metamaterials, like, ferromagnets and carbonyl iron nanocrystalline flakes, such as large thickness, high density, and processing challenge.…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

An anisotropic broadband coding metasurface based on ultralight graphene‐assembled film

Luo,

Zu,

Song

et al. 2023

Micro & Optical Tech Letters

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As theoretical research further develops, coding metasurfaces have been widely studied and applied due to their uniqueness in digital characterization and sequence arrangement. In this work, based on highly conductive graphene‐assembled film (GAF), an ultralight anisotropic broadband coding metasurface (ABCM) is proposed. The GAF ABCM consists of 16 units with specific phase responses and enables complete metal substitution. By arranging the unit cells in a specific order, the GAF ABCM realizes the functions of anomalous reflection, polarization conversion, and radar cross‐section (RCS) reduction. Results validate that the GAF ABCM has a measured 10 dB normal incidence backward RCS reduction within the working frequency band of 7–18 GHz, which fully covers the X‐band and Ku‐band for radar application. Furthermore, due to the lightweight property of GAF, the density of the GAF ABCM is only 0.06 g/cm3 (surface mass density of 0.038 g/cm2). All results indicate that the lightweight GAF metasurface is promising in radar stealth and communication fields.

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“…Thus, it is essential to achieve the RCS reduction of the curved surface structure in order to considerably reduce the aircraft's backward electromagnetic scattering and improve the target's combat survivability. The majority of the studies on RCS reduction of curved structures [4][5][6][7][8][9][10][11][12][13][14][15][16][17][18] that are currently available focus on convex structures [4][5][6][7][8][9][10][11][12][13][14][15], while concave structures [16][17][18] have received limited attention in previous studies. Ishii et al using a concave metasurface absorber, achieved a −10 dB RCS reduction at 9.88 GHz under normal incident [16].…”

Section: Introductionmentioning

confidence: 99%

Ultra-wideband and wide-angle RCS reduction of a concave structure based on a chessboard polarization conversion metasurfaces

He,

Chen,

Liu

et al. 2023

J. Phys. D: Appl. Phys.

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In this paper, ultra-wideband and wide-angle radar cross section (RCS) reduction of a concave structure is designed and realized based on a chessboard polarization conversion metasurface (CPCM), employing an ultra-wideband polarization conversion metasurface (PCM) composed of a single layer of square split-ring resonators. The concave structure, which is equivalent to an octagonal-like prism, is divided into eight regions. To achieve perfect phase cancellation in the non-central region, it can be equivalent to oblique incidence when the central region is under normal incidence, and phase compensation of the unit cell of metasurfaces in the non-central region is considered. The simulated results demonstrate that the RCS reduction of the proposed concave structure is less than -10 dB in the frequency ranges of 8.8 GHz to 35.75 GHz with fractional bandwidths of 120.99% and exceeds -30 dB at numerous resonant frequencies such as 9.52 GHz, 13.89 GHz, 23.45 GHz, and 35.2 GHz under normal incidence. The experimental results are in good agreement with the simulations. Furthermore, the RCS reduction characteristics of the proposed concave structure at different azimuth angles are also evaluated. Numerical calculations and experiments show that the wide-angle RCS reduction from 0° to 34° is achieved. To the best of the information we have, this is the first time that the chessboard metasurfaces, which consist of several polarizing reflectors, have been employed to obtain broadband and wide-angle RCS reduction for the concave structure. This technique validates the novelty and effectiveness of wide-angle and ultra-wideband RCS reduction of the concave structure.

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RCS Reduction from Conformal Surfaces Using Plasma-Based AMC Arrays

Cited by 22 publications

References 13 publications

Plasma Generator with Dielectric Rim and FSS Electrode for Enhanced RCS Reduction Effect

Plasma Generator with Dielectric Rim and FSS Electrode for Enhanced RCS Reduction Effect

An anisotropic broadband coding metasurface based on ultralight graphene‐assembled film

Ultra-wideband and wide-angle RCS reduction of a concave structure based on a chessboard polarization conversion metasurfaces

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