Multispectral flexible ultrawideband metamaterial absorbers for radar stealth and visible light transparency

Kang, Jinfeng; Qu, Zeng; Duan, Junping; Jing, Huihui; Hao, Jingxian; Song, Chengwei; Wang, Jiayun; Zhang, Binzhen

doi:10.1016/j.optmat.2022.113351

Cited by 16 publications

(5 citation statements)

References 27 publications

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“…Because patterns of different sizes produce distinct resonance responses, fractal structures composed of self-similar patterns scaled down from the original dimensions can achieve multi-band properties. Among the other fractal structures, the primary advantages of employing second-order cross-fractal structures are that despite their simple structure, it is still feasible for them to have the dual-band properties and TE, TM polarization insensitiveness due to rotational symmetry [26,27,32]. Therefore, in this study, we adopted second-order cross-fractal structures to implement dual-band absorption frequencies for the proposed optically transparent MMA.…”

Section: Design Of the Second-order Cross-fractal-structured Mmamentioning

confidence: 99%

“…In the pursuit of expanding the number of applications of MMAs, numerous researchers have attempted to develop a transparent MMA [19,[27][28][29][30][31][32][33]. The structure of an MMA typically comprises three layers: a conductive resonance layer at the top, an intermediate dielectric layer, and a conductive ground layer at the bottom.…”

Section: Introductionmentioning

confidence: 99%

“…Among the various candidates for transparent conductors [29,30,34], indium tin oxide (ITO) and silver (Ag) nanowire composites have been validated. In particular, ITO is favored for its optimal balance of transparency and conductivity [19,27,[31][32][33]. Dongyong et al [19] explored an optically transparent MMA with a second-order cross-fractal structure that employed ITO for the conductive pattern and PET and PMMA as the substrate materials.…”

Section: Introductionmentioning

confidence: 99%

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Optically Transparent Dual-Band Metamaterial Absorber Using Ag Nanowire Screen-Printed Second-Order Cross-Fractal Structures

Bark,

Kim,

Lee

et al. 2024

Fractal Fract

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In this paper, we propose an optically transparent dual-band metamaterial absorber (MMA) that uses Ag nanowire screen-printed fractal structures. The proposed MMA exhibits near-perfect absorption in the C- and K-bands. This dual-band absorption property is achieved through two inductive–capacitive (L-C) resonances located at 6.45 and 21.14 GHz, which are generated by the second-order fractal structures. We analyzed the microwave absorbing mechanisms through the distributions of the surface current and electromagnetic field on the top and bottom layers. The MMA demonstrates an optical transmittance of 63.1% at a wavelength of 550 nm. This high optical transmittance is attained by screen printing transparent Ag nanowire ink onto a transparent PET substrate. Since screen printing is a simple and low-cost fabrication method, the proposed MMA offers the advantages of being low cost while having the properties of optical transparency and effective dual-band absorption. Consequently, it holds great potential for the radar stealth application of C- and K-bands in that it can be attached to the windows of stealth aircraft due to its optical transparency and dual-band near-perfect absorption property.

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Section: Design Of the Second-order Cross-fractal-structured Mmamentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Optically Transparent Dual-Band Metamaterial Absorber Using Ag Nanowire Screen-Printed Second-Order Cross-Fractal Structures

Bark,

Kim,

Lee

et al. 2024

Fractal Fract

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“…Metamaterial Absorbers, proposed by Landy at al. is one of the bourgeoning elds having unprecedented growth in sensing [16,17], imaging [18,19], stealth technology [20][21][22][23], Radar ross section (RCS) reduction [24][25][26][27][28], EM Wave shielding [29][30][31], solar cells [32][33][34][35], thermal emitter [36,37], and antenna design applications [38][39][40][41].…”

Section: Introductionmentioning

confidence: 99%

Polarization-Insensitive Ultra-wideband Metamaterial Absorber for C-, X- and Ku-bands

Majeed,

Niazi,

Altintas

et al. 2023

Preprint

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This paper presents design and analysis of Metasurface-based wideband Microwave Absorber Comprised of Lumped Resistors having a thickness of the order of 0.05 λ mm operating in the C-, X- and Ku-bands. Structure has been micro machined on a FR-4 sheet in a periodically arranged array of 15x15 unit cells. These unit cells have a dimension of 12x12 mm each. The proposed absorber design presents excellent broadband absorption characteristics with relative bandwidth (RBW) of 93.3% covering a bandwidth of 8.02 GHz ranging from 5.42 GHz to 13.44 GHz. The absorption mechanism has been explained with the help of characteristic impedance and surface current densities in the operating region. The designed absorber shows polarization angle independency and wide incidence angle stability for the incident microwaves. Results of the prototype when compared with the simulated results illustrate a wider compatibility with the simulation results. Absorber structure may find its potential use in camouflage applications during war times.

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“…In recent years, the metamaterial structure has been widely used in many application fields such as metamaterial absorbers, specific absorption rate reduction, satellite frequency, wireless communication, military applications, transmissive deflection, focusing, and orbital angular momentum, etc. 1 – 9 . The metamaterial term is defined as man-made material that is unable to be found in nature.…”

Section: Introductionmentioning

confidence: 99%

Symmetric left-handed split ring resonator metamaterial design for terahertz frequency applications

Ramachandran,

Faruque,

Al-mugren

2023

Sci Rep

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This work focused on the novel symmetrical left-handed split ring resonator metamaterial for terahertz frequency applications. A compact substrate material known as Silicon with a dimension of 5 µm was adopted in this research investigation. Moreover, several parameter studies were investigated, such as clockwise rotation, array and layer structure designs, larger-scale metamaterials, novel design structure comparisons and electric field distribution analysis. Meanwhile, two types of square-shaped metamaterial designs were proposed in this work. The proposed designs exhibit double and single resonance frequencies respectively, likely at 3.32 and 9.24 THz with magnitude values of − 16.43 and − 17.33 for the first design, while the second design exhibits a response at 3.03 THz with a magnitude value of − 19.90. Moreover, the verification of these results by adopting High-frequency Structure Simulator software indicates only slight discrepancies which are less than 5%. Furthermore, the initial response of the proposed designs was successfully altered by simply rotating the design clockwise or even increasing the dimension of the design. For instance, the first resonance frequency is shifted to the lower band when the first proposed design was rotated 90°. On the other hand, by increasing the size of the metamaterial, more than nine resonance frequencies were gained in each symmetric design. Furthermore, the symmetric metamaterial with a similar width and length of 10 µm dimension was adopted for both design structures to construct an equivalent circuit model by utilising Advanced Design System software. Finally, both unit cell designs were utilised to explore the absorption performances which exhibit four and five peak points. Overall, the altering behaviour by changing physical properties and compact design with acceptable responses become one of the novelties of this research investigation. In a nutshell, the proposed designs can be utilised in terahertz frequency which gives optimistic or advantageous feedback and is relatively suitable for the adopted frequency range.

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Multispectral flexible ultrawideband metamaterial absorbers for radar stealth and visible light transparency

Cited by 16 publications

References 27 publications

Optically Transparent Dual-Band Metamaterial Absorber Using Ag Nanowire Screen-Printed Second-Order Cross-Fractal Structures

Optically Transparent Dual-Band Metamaterial Absorber Using Ag Nanowire Screen-Printed Second-Order Cross-Fractal Structures

Polarization-Insensitive Ultra-wideband Metamaterial Absorber for C-, X- and Ku-bands

Symmetric left-handed split ring resonator metamaterial design for terahertz frequency applications

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