RCS Reduction Based on Concave/Convex-Chessboard Random Parabolic-Phased Metasurface

Fang, Yuan; Xu, Haojun; Jia, Xue-Qin; Wang, Guangming; Fu, Yunqi

doi:10.1109/tap.2019.2940503

Cited by 70 publications

(25 citation statements)

References 32 publications

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“…In recent years, scientists have realized 2D planar electromagnetic devices, which are called metasurface, [ 9–35 ] such as, refraction devices, [ 36–40 ] meta‐lenses, [ 41–51 ] and vortex generators. [ 52–56 ] In most of these devices, Lorentz resonance units are used.…”

Section: Introductionmentioning

confidence: 99%

Highly Efficient and Broadband Achromatic Transmission Metasurface to Refract and Focus in Microwave Region

Cai

et al. 2021

Laser & Photonics Reviews

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Achromatic devices have wide application prospects in radar and imaging fields. However, chromatic aberration and limited bandwidth restrict their development. Moreover, broadband and highly efficient achromatic devices working in transmission mode are still difficult to realize. In this paper, broadband highly efficient achromatic transmission in the microwave region by a metasurface is achieved. First, the ideal dispersion conditions of achromatic meta-atoms are given. Then, a polarization selective grating metasurface and a split ring slot metasurface are designed using the transfer matrix method and equivalent circuit theory, respectively. The former is used to control phase characteristics while the latter enables controlling dispersion. Phase and dispersion can be controlled independently by cascading them and any phase curve can be designed as is desired. In order to verify the strategy, an achromatic deflector and an achromatic lens are designed and samples are fabricated. The experimental results show that the deflector can realize achromatic refraction from 9.3 to 12.3 GHz with average efficiency 77.5% and the lens can realize achromatic focusing from 9.8 to 12.2 GHz with average efficiency 78.9%, respectively. The experimental results are in good agreement with theory. The findings provide valuable strategy for achromatic devices design, which can be widely applied.

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Section: Introductionmentioning

confidence: 99%

Highly Efficient and Broadband Achromatic Transmission Metasurface to Refract and Focus in Microwave Region

Cai

et al. 2021

Laser & Photonics Reviews

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“…At the same time, an eletromagnetci window should be open for various antennas or antenna arrays on the platform to transmit/receive electromagnetic wave. Traditional RCS reduction methods including integrated with metasurfaces or frequency selective surfaces (FSSs) based on the principle of phase cancellation [1]- [3], using wideband microwave absorber [4]- [6], or combining absorptive and diffusive structures [7], [8]. However, these techniques typically affect the performance of the antenna in an adverse way by reducing its gain and/or by distorting its radiation pattern in an undesirable manner.…”

Section: Introductionmentioning

confidence: 99%

Wideband Low RCS Antenna Based on Hybrid Absorptive-Diffusive Frequency Selective Reflector

Zhang

Jin

et al. 2021

IEEE Access

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A method for designing a wideband low radar cross section (RCS) antenna is proposed based on hybrid absorptive and diffusive frequency selective reflector (AD-FSR) in this paper. The low RCS antenna exhibits manifold frequency responses in three artificial bands, which are created by its different components. A simple U-slot patch antenna is borrowed, which is integrated with the diffusion metasurface, and placed under the absorptive sheet with about quarter wavelength. Then, the out-of-band incident wave is captured by the absorber in the lower frequency band, and diffused by the metasurface in the upper frequency band achieving the RCS reduction. The design strategies are explained and verified with the aid of the corresponding equivalent circuit model and current distributions. To illustrate the efficacy of the proposed approach, the low RCS antenna using the proposed hybrid AD-FSR structure is fabricated and tested, and the results demonstrate that the proposed structure is an attractive candidate for designing wideband low RCS antennas.INDEX TERMS Absorber, diffusion metasurface, frequency selective surface, patch antenna, radar cross section (RCS).

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“…In [1] a modified chessboard was proposed, and each quadrant of the conventional chessboard was replaced by a small size 1-bit reflectarray exhibiting an optimized diffusive 1-bit quantized phase distribution to achieve nearly uniform diffusive scattering under both normal and oblique incidence of EM-waves. In [10]- [11], the scattering characteristics of metasurfaces exhibiting concave and convex reflection phases were investigated for RCS reduction for linearly polarized waves. Furthermore, a coding metasurface was introduced in [15]- [16] in which the coding particles (unit cells) were arranged according to a certain coding sequence to achieve low-level backscattering, and potentially any other desired functions [17]- [20].…”

Section: Introductionmentioning

confidence: 99%

Aperiodic Sunflower-Like Metasurface for Diffusive Scattering and RCS Reduction

Al-Nuaimi

Wang

Whittow

2020

Antennas Wirel. Propag. Lett.

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Abstract-This article presents the design of aperiodic sunflower-like metasurface for circularly polarized (CP) wave diffusion and radar cross section (RCS) reduction using Pancharatnam-Berry (PB) meta-atoms. The distribution of the PB meta-atoms across the metasurface aperture is non-uniform and has a distribution inspired by sunflower seeds, i.e., an outwardly logarithmic spiral lattice with no transitional periodicity. The proposed metasurface has 600 PB meta-atoms of sub-wavelength size of 5 mm ≈ 0.33λ 20GHz and exhibits a randomly chosen diffusive reflection phase between 0 o and 360 o . Both simulated and experimental results demonstrate that the proposed sunflower-like metasurface can efficiently diffuse the backscattered energy into numerous directions when normally illuminated by a CP-wave with RCS reduction > 7 dB between 16 GHz and 23.8 GHz. Furthermore, the low-level diffuse scattering can be preserved under oblique incidence up to 60 o . As a result of using this PB concept, the polarization sensitivity of the proposed metasurface is released and this is highly desired in applications when the polarization of the incoming wave is unknown.

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RCS Reduction Based on Concave/Convex-Chessboard Random Parabolic-Phased Metasurface

Cited by 70 publications

References 32 publications

Highly Efficient and Broadband Achromatic Transmission Metasurface to Refract and Focus in Microwave Region

Highly Efficient and Broadband Achromatic Transmission Metasurface to Refract and Focus in Microwave Region

Wideband Low RCS Antenna Based on Hybrid Absorptive-Diffusive Frequency Selective Reflector

Aperiodic Sunflower-Like Metasurface for Diffusive Scattering and RCS Reduction

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