Optically Transparent Ultrawideband Electromagnetic Stealth Metasurface for Microwave Absorption and Scattering

Ran, Yuzhou; Shi, Lihua; Wu, Shuran; Li, Jie; Jin, Xin; Hou, Zhenwei; Fan, Bo; Wang, Jianbao

doi:10.1109/lawp.2022.3194724

Cited by 14 publications

(5 citation statements)

References 29 publications

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“…In recent years, hybrid mechanism metasurfaces have also been intensively studied [22][23][24][25][26][27][28][29]. In [29] , Zhao et al proposed a hybrid mechanism metasurface.…”

Section: Lmentioning

confidence: 99%

“…Referring to [25], a metal plate of the same size as the metasurface was used for calibration as follows: first, the reflection coefficient of the equal-sized metal plate was measured, then, the reflection coefficient of the encoded metasurface was tested to obtain the final RCS reduction value. For TE and TM waves, the metasurface only differs in coding sequence, so the RCS reduction under different polarizations can be tested by rotating the sample 90°.…”

Section: Measurementmentioning

confidence: 99%

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A low-profile coding metasurface for broadband radar cross section reduction via beam diffusion and absorption

Zhou,

Yang,

Jin

et al. 2024

Phys. Scr.

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A low-profile coding metasurface based on beam diffusion and absorption is proposed, which can be applied for broadband Radar Cross Section (RCS) reduction. Through inserting resistors into the polarization conversion element, the proposed unit cell can convert a portion of the electromagnetic wave to ohmic loss as well as retain polarization conversion. Subsequently, the power loss and surface current were used to explain the mechanism of absorption and polarization conversion, and the arrangement of the elements was optimized using a simulated annealing algorithm. Furthermore, both the simulated and measured results have shown that the RCS reduction is greater than 10 dB at 6.7-19.3 GHz (96.9% relative bandwidth), and the metasurface still maintains great characteristics at 45° incidence.Thanks to the proposed metasurface offer advantages such as fewer resistors, a wider bandwidth for RCS reduction, an ultra-thin profile (0.066λL, where λL represents the longest wavelength), a stable incident angle, and a more uniform scattering of energy, it can be used in electromagnetic stealth for large targets.

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“…In recent years, hybrid mechanism metasurfaces have also been intensively studied [22][23][24][25][26][27][28][29]. In [29] , Zhao et al proposed a hybrid mechanism metasurface.…”

Section: Lmentioning

confidence: 99%

Section: Measurementmentioning

confidence: 99%

A low-profile coding metasurface for broadband radar cross section reduction via beam diffusion and absorption

Zhou,

Yang,

Jin

et al. 2024

Phys. Scr.

View full text Add to dashboard Cite

show abstract

“…[3][4][5][6] From the microwave to optical fields, various applications have been derived from metasurfaces, such as flat lens, anomalous reflections, electromagnetic stealth, holographic imaging, orbital angular momentum beam generation, dynamic beam-scanning, and dynamic beam-forming. [7][8][9][10][11][12][13][14][15][16][17] In 2014, the concept of "digital metamaterial" was first introduced by Della Giovampaola and Engheta. 18 Cui et al also proposed the idea of coding metamaterial in the same year, effectively connecting code numbers with metasurface.…”

Section: Introductionmentioning

confidence: 99%

“…Metasurfaces have good performance in modulating phase, amplitude, and polarization 3–6 . From the microwave to optical fields, various applications have been derived from metasurfaces, such as flat lens, anomalous reflections, electromagnetic stealth, holographic imaging, orbital angular momentum beam generation, dynamic beam‐scanning, and dynamic beam‐forming 7–17 . In 2014, the concept of “digital metamaterial” was first introduced by Della Giovampaola and Engheta 18 .…”

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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“…Recently, the incorporation of random metasurfaces with an absorption mechanism, known as diffusion–absorption hybrid metasurfaces, has emerged as an effective strategy to enhance performance in wideband, strong reduction, and low‐profile designs. [ 13–16 ] By utilizing diffusion and absorption in the overlapping and adjacent frequency bands, these metasurfaces can achieve significant improvements in reducing the scattering field (over 20 dB) [ 17–19 ] and enhancing bandwidth (up to 185.5%). [ 20–22 ] The hybrid absorption and diffusion mechanisms also enable a more compact metasurface with a thickness of 0.029 λ at the lowest operation wavelength.…”

Section: Introductionmentioning

confidence: 99%

Inverse Design of Diffusion–Absorption Hybrid Metasurfaces

Song

Zhang

Min

et al. 2023

Laser & Photonics Reviews

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Random metasurfaces have demonstrated significant potential in radar‐signature control applications, but their ability to manipulate scattering‐field reduction is limited by relying solely on the diffusion mechanism. To achieve flexible and arbitrary designs for scattering‐field reduction, a diffusion–absorption hybrid metasurface is proposed based on the Babinet principle. This hybrid metasurface adopts complementary bilayer metasurfaces to satisfy the impedance matching condition and employs a hybrid absorption and diffusion mechanism. Such complementary designs' intralayer resonances and interlayer couplings are tailored by multi‐objective optimization, achieving the precise and wideband design of absorptive elements with a specific reflection phase. By optimizing the spatial distributions of elements, diffusion is introduced and designs are achieved with a continuous scattering‐field reduction from 15.40 to 32.58 dB at 15 GHz. Three representative designed structures are fabricated and verified as proof of concept. The experimental results are consistent with the calculations and simulations, demonstrating a 12.32–24.46 dB scattering‐field reduction range. The proposed high‐freedom metasurface and the implementation multi‐objective optimization strategy collectively empower flexible wavefront manipulation, offering a viable solution for designing hybrid meta‐devices that incorporate multiple mechanisms.

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Optically Transparent Ultrawideband Electromagnetic Stealth Metasurface for Microwave Absorption and Scattering

Cited by 14 publications

References 29 publications

A low-profile coding metasurface for broadband radar cross section reduction via beam diffusion and absorption

A low-profile coding metasurface for broadband radar cross section reduction via beam diffusion and absorption

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

Inverse Design of Diffusion–Absorption Hybrid Metasurfaces

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