Extremely Wideband and Omnidirectional RCS Reduction for Wide-Angle Oblique Incidence

Qu, Meijun; Zhang, Chenyang; Su, Jianxun; Liu, Jinbo; Li, Zengrui

doi:10.1109/tap.2022.3161309

Cited by 8 publications

(4 citation statements)

References 21 publications

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“…In [ 23 ], a binary-coded metasurface was designed, based on machine learning optimisation techniques, to achieve 10 dB RCS reduction in 14–20 GHz. Qu et al proposed an optimized multi-element phase cancellation (OMEPC) method to design checkerboard metasurfaces [ 24 ]. By optimizing the shape and size of various unit cells, a 10 dB RCS reduction can be achieved in the ultra-wideband frequency band of 7.4–64.8 GHz.…”

Section: Introductionmentioning

confidence: 99%

Transparent and Ultra-Thin Flexible Checkerboard Metasurface for Radar–Infrared Bi-Stealth

Chang,

Ji,

Chen

et al. 2024

Sensors

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This paper proposed a single-layer checkerboard metasurface with simultaneous wideband radar cross-section (RCS) reduction characteristics and low infrared (IR) emissivity. The metasurface consists of an indium tin oxide (ITO)-patterned film, a polyethylene terephthalate (PET) substrate and an ITO backplane from the top downwards, with a total ultra-thin thickness of 1.6 mm. This design also allows the metasurface to have good optical transparency and flexibility. Based on phase cancellation and absorption, the metasurface can achieve a wideband RCS reduction of 10 dB from 10.6 to 19.4 GHz under normal incidence. When the metasurface is slightly cylindrically curved, an RCS reduction of approximately 10 dB can still be achieved from 11 to 19 GHz. The polarization and angular stability of the metasurface have also been verified. The filling rate of the top ITO-patterned film is 0.81, which makes the metasurface have a low theoretical IR emissivity of 0.24. Both simulation and experimental results have verified the excellent characteristics of the proposed checkerboard metasurface, demonstrating its great potential application in radar–IR bi-stealth.

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Section: Introductionmentioning

confidence: 99%

Transparent and Ultra-Thin Flexible Checkerboard Metasurface for Radar–Infrared Bi-Stealth

Chang,

Ji,

Chen

et al. 2024

Sensors

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“…Qu et al . designed a chessboard metasurface based on OMEPC, which exhibits 10 dB RCS reduction in a superwide frequency band from 7.4 to 64.8 GHz while maintaining good oblique incidence stability [31].…”

Section: Introductionmentioning

confidence: 99%

Transparent and Flexible Chessboard Metasurface Based on Optimized Multielement Phase Cancellation for Wideband RCS Reduction

Chang,

Ji,

2024

IEEE Access

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An optically transparent chessboard metasurface is proposed to achieve wideband radar cross section (RCS) reduction in this paper. The metasurface is a single-layer sandwich structure composed of indium-tin-oxide (ITO) square patches with different sizes and surface resistances, polyethylene terephthalate (PET) substrate, and ITO backplane from the top downwards. Based on optimized multielement phase cancellation (OMEPC) to select the sizes and surface resistances of ITO patches, the proposed metasurface can achieve the 10 dB RCS reduction from 10.1 to 26.4 GHz with a relative bandwidth of 89% under normal incidence. The total thickness of the metasurface is 2 mm, which makes it highly flexible. When there is a slight cylindrical curvature on the metasurface and the curvature angle is less than 30 • , an approximate 10 dB RCS reduction can still be achieved in the frequency range of 10-25 GHz under normal incidence. When the oblique incidence angle is less than 45 • , the proposed metasurface also exhibits nearly 10 dB RCS reduction at the specular direction in the frequency range of 10-25 GHz. Finally, a sample is fabricated and measured, and the experimental results are in good agreement with the simulation results.INDEX TERMS chessboard metasurface, optimized multielement phase cancellation (OMEPC),radar cross section (RCS) reduction,transparent,flexible.

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“…However, absorbing materials are typically expensive and tend to fail at high temperatures. The metasurface offers a novel technique for RCS reduction that distributes energy in the direction away from the threat by manipulating the wavefront [21][22][23][24][25][26][27][28][29][30][31][32]. However, metasurfaces are relatively rarely used to regulate the scattering of cavities [23].…”

Section: Introductionmentioning

confidence: 99%

Design of Broadband and Ultra-Wide-Angle Low-RCS Open-Ended Cavity Based on Phase Cancellation

He,

Chen,

Liu

et al. 2023

International Journal of RF and Microwave Computer-Aided Engine

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In this paper, it is proposed to employ phase cancellation metasurface (PCM) to substantially reduce the RCS of an electrically large open-ended cavity (EOC) by scattering the energy to the nonthreatening region, achieving broadband and ultra-wide-angle RCS reduction of the cavity. The PCM, constituted by the collection of polarizing reflectors, is loaded on the inner and outer walls of the composed cavity structure in accordance with the orthogonality principle to obtain a low-RCS cavity. The main benefits of using the polarizing reflector to build a PCM are as follows: On the one hand, it reduces the number of units that make up the PCM, which in principle only requires half of the quantity. On the other hand, it is possible to form a phase difference of 180 degrees that is completely stable. Both the simulation and measured results show that the RCS reduction of 10 dB for normal incidence relative to the original state of the cavity (that is, the metal cavity) over a frequency range of 6.3 GHz to 13.2 GHz under TE polarization and 7.8 GHz to 13.4 GHz under TM polarization has been obtained. Furthermore, the RCS reduction performances of the cavity loaded with the composed PCM under variable azimuth angles are also studied. Numerical and experimental results demonstrate that the ultra-wide-angle RCS reduction from -180° to 180° is acquired. To the best of our knowledge, this is the first time that the PCM, which is made up of a number of polarizing reflectors, has been used to get broadband and ultra-wide-angle RCS reduction for the EOC. This method, which is simple, effective, and low cost, has great application prospects in the RCS reduction design of the cavity.

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Extremely Wideband and Omnidirectional RCS Reduction for Wide-Angle Oblique Incidence

Cited by 8 publications

References 21 publications

Transparent and Ultra-Thin Flexible Checkerboard Metasurface for Radar–Infrared Bi-Stealth

Transparent and Ultra-Thin Flexible Checkerboard Metasurface for Radar–Infrared Bi-Stealth

Transparent and Flexible Chessboard Metasurface Based on Optimized Multielement Phase Cancellation for Wideband RCS Reduction

Design of Broadband and Ultra-Wide-Angle Low-RCS Open-Ended Cavity Based on Phase Cancellation

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