Actively tunable rasorber with broadband RCS reduction and low infrared emissivity

Fan, Chunzhen; Duan, Kun; Chen, Ke; Jiang, Tianyue; Zhao, Junming; Feng, Yijun

doi:10.1364/oe.494952

Cited by 11 publications

(1 citation statement)

References 33 publications

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“…The first method involves blending semiconductors and other compounds to regulate the absorption and reflection of coatings at both IR and microwave wavelengths. − The second method involves the utilization of a structural metasurface to achieve compatibility between low microwave frequencies and high IR frequencies. This is made possible by the unique capability of metasurface to manipulate and control the properties of incident and reflected waves. − For example, Zhu et al devised a polarization conversion metasurface (PCM) that operated in both microwave and infrared spectra. Additionally, the nonmetallic section was augmented by adding a higher proportion of metal, resulting in the diminishing of the IR emissivity.…”

Section: Introductionmentioning

confidence: 99%

Multifunctional Ultrathin Metasurface with a Low Radar Cross Section and Variable Infrared Emissivity

Zhang,

Ren

et al. 2024

ACS Appl. Mater. Interfaces

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The development of stealth devices that are compatible with both infrared (IR) and radar systems remains a significant challenge, as the material properties required for effective IR and radar stealth are often contradictory. In this work, based on an IR electrochromic device (IR-ECD), concepts of metamaterial manipulating electromagnetic waves are applied to develop a multifunctional ultrathin metasurface with a low radar cross section (RCS) and variable infrared emissivity. This paper presents a linear-to-linear polarization conversion metasurface (PCM) designed by hollowing the IR-ECD. In this way, the IR-ECD based on polyaniline (PANI) can also modulate the reflection waves in the microwave band without affecting its features in the infrared region. Thus, the proposed metasurface integrates both microwave stealth and variable infrared emissivity through a single layer. The measured results show that a 10 dB RCS reduction is achieved in the band of 8.46−9.5 GHz, and the infrared emissivity can be adjusted from 0.870 to 0.513 in the infrared stealth band of 8−14 μm. Due to the ultrathin thickness (only 0.081λ 0 at 9 GHz), low RCS in the X-band, and variable infrared emissivity, the designed multifunctional stealth metasurface has promising applications on military platforms with various surrounding environments.

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Section: Introductionmentioning

confidence: 99%

Multifunctional Ultrathin Metasurface with a Low Radar Cross Section and Variable Infrared Emissivity

Zhang,

Ren

et al. 2024

ACS Appl. Mater. Interfaces

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Frequency Selective Rasorber for 5G New Radio Communication System

2024

2024 International Conference on Recent Advances in Electrical, Electronics, Ubiquitous Communication, and Computational Intell

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Polarization-insensitive graphene-based band-notched frequency selective absorber at terahertz

Malekara,

Ghobadi,

Nourinia

2024

Appl. Opt.

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This paper introduces a new polarization-insensitive graphene-based frequency selective absorber (FSA) with a reflective notch designed for terahertz applications. The proposed structure features two absorption bands on either side of a central reflection band. The design composes a lossy frequency selective surface (FSS), a bandstop FSS with a metal backing, and an air spacer between. A wideband absorber structure is developed in the first step, leveraging graphene as an absorbent material in the lossy layer to achieve wideband absorptive characteristics. Subsequently, a reflection band is introduced by integrating a bandstop, lossless FSS layer into the absorber structure. The overall structure demonstrates two distinct absorption bands, characterized by absorptivity exceeding 80% within the frequency ranges of 0.30 to 0.57 and 0.67 to 0.90 THz. Simultaneously, a reflection notch is achieved at 0.60 THz. Extensive simulations assessed the performance of the designed FSA. The proposed structure exhibits stability under oblique incidence up to 40 deg and allows tunable absorption specifications by adjusting the chemical potential of graphene. It is noteworthy that the FSA reflector offers advantages such as eliminating the need for complicated, high-cost 3-D structures and welding of the lumped resistors.

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Actively tunable rasorber with broadband RCS reduction and low infrared emissivity

Cited by 11 publications

References 33 publications

Multifunctional Ultrathin Metasurface with a Low Radar Cross Section and Variable Infrared Emissivity

Multifunctional Ultrathin Metasurface with a Low Radar Cross Section and Variable Infrared Emissivity

Frequency Selective Rasorber for 5G New Radio Communication System

Polarization-insensitive graphene-based band-notched frequency selective absorber at terahertz

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