An ultrathin and broadband radar absorber using metamaterials

Zhou, Bi Cheng; Wang, Dong Hong; Jiang, Jiang; Li, Bao Yi; Zhao, Yifan; Li, Ke Xun

doi:10.1080/17455030.2019.1634301

Cited by 10 publications

(6 citation statements)

References 22 publications

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“…Therefore, MMAs can replace traditional absorbers, such as wedge-shaped, Salisbury screen, Jauman layer, and ferrite absorbers due to their bulkiness and thickness, although limited to a few applications [24]. The main benefit of MMAs over traditional absorbers is their ease of fabrication, low cost, lightweight, ultra-thin thickness, and nearunity absorption [25]. Most MMAs consists of a three-layer sandwich model (metal lossy substrate-metal) [26].…”

Section: Introductionmentioning

confidence: 99%

Quad-Band Polarization-Insensitive Square Split-Ring Resonator (SSRR) with an Inner Jerusalem Cross Metamaterial Absorber for Ku- and K-Band Sensing Applications

Hakim

Alam

Islam

et al. 2022

Sensors

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The development of metamaterial absorbers has become attractive for various fields of application, such as sensing, detectors, wireless communication, antenna design, emitters, spatial light modulators, etc. Multiband absorbers with polarization insensitivity have drawn significant attention in microwave absorption and sensing research. In this paper, we propose a quad-band polarization-insensitive metamaterial absorber (MMA) for Ku- and K-band applications. The proposed patch comprises two square split-ring resonators (SSRR), four microstrip lines, and an inner Jerusalem cross to generate four corresponding resonances at 12.62 GHz,14.12 GHz, 17.53 GHz, and 19.91 GHz with 97%, 99.51%, 99%, and 99.5% absorption, respectively. The complex values of permittivity, permeability, refractive index, and impedance of MMA were extracted and discussed. The absorption mechanism of the designed MMA was explored by impedance matching, equivalent circuit model, as well as magnetic field and electric field analysis. The overall patch has a rotational-symmetrical structure, which plays a crucial role in acquiring the polarization-insensitive property. The design also shows stable absorption for both transverse electric (TE) and transverse magnetic (TM) modes. Its near-unity absorption and excellent sensing performance make it a potential candidate for sensing applications.

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Section: Introductionmentioning

confidence: 99%

Quad-Band Polarization-Insensitive Square Split-Ring Resonator (SSRR) with an Inner Jerusalem Cross Metamaterial Absorber for Ku- and K-Band Sensing Applications

Hakim

Alam

Islam

et al. 2022

Sensors

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“…Metamaterials with negative dielectric constant or negative refractive index are also commonly referred to as left-handed materials [1][2][3], which typically have the characteristics of high absorption [4], thin thickness [5], simple structure [6] and frequency selectivity [7]. At present, the research, development, and utilization of metamaterials in stealth technology [8,9], radar [10,11], wave-absorbing materials [12,13], communications [14,15] and other aspects have become the focus of competition among countries. The materials that make up metamaterials do not play a major role in the properties of metamaterials but are mainly determined by their internal unit structures, which provides greater room for research on metamaterials.…”

Section: Introductionmentioning

confidence: 99%

A five-band terahertz metamaterial absorber with properties of polarization-insensitive and wide-angle tolerance based on bulk Dirac semimetal

Qin,

Jiang,

Duan

et al. 2024

J. Opt.

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We design a bulk Dirac semimetal (BDS) metamaterial-based terahertz absorber consisted of a BDS layer, a dielectric layer and a gold grounding layer from top to bottom, which produces five excellent terahertz absorption peaks having 99.55%, 99.63%, 99.65%, 97.72%, and 99.87% absorption at 0.49 THz, 0.85 THz, 1.68 THz, 2.00 THz, and 2.27 THz, respectively. The five-band BDS-based absorber is polarization-insensitive and wide-angle insensitive, with good absorption in the incident angle range of 0-60°. The tuning of the Fermi energy level of BDS in the range of 40 meV to 70 meV enables the dynamic adjustment of absorption frequencies and absorption rates of these peaks. We also analyze the refractive index sensing sensitivity of five-band BDS-based absorber, it is revealed that when the refractive index of surrounding analyte is changed from 1.0 to 1.8, the refractive indices of the five absorption peaks are 57.75 GHz/RIU, 107.25 GHz/RIU, 101.75 GHz/RIU, 101.75 GHz/RIU, and 134.75 GHz/RIU, which approximately exhibit an enhanced sensing sensitivity as the absorption frequency increases. The design is simultaneously characterized by multiple bands, high absorption, high stability ,and high refractive index sensitivity, which should have great potential for application in the fields of terahertz technology.

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“…In 2008, the so-called metamaterial perfect absorber (MPA) was devised by Landy et al [4], which showed a very high absorption but was very thin. The MPAs have high potential for a variety of applications such as for photodetectors [5,6], sensors [7,8], energy harvesters [9,10], and stealth technology [11][12][13]. Since then, the commercial uses of MPAs for healthcare and civilian demands have induced more intensive research on them and their applications.…”

Section: Introductionmentioning

confidence: 99%

Flexible Broadband Metamaterial Perfect Absorber Based on Graphene-Conductive Inks

et al. 2021

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In this work, we proposed a flexible broadband metamaterial perfect absorber (FBMPA) by exploiting a pasted conductive-graphene ink on a polyimide substrate. For the flat FBMPA, an absorption over 90% was found to cover a wide frequency range (from 7.88 to 18.01 GHz). The high-absorption feature was polarization-insensitive and regarded as stable with respect to the oblique incidence up to 30 degrees of electromagnetic wave. The high absorption was maintained well even when the absorber was wrapped. That is, the FBMPA was attached to cylindrical surfaces (with the varying radius from 4 to 50 cm). For both flat and curved states, the absorption mechanism was explained by the perfect impedance matching and the dielectric loss of the proposed absorber. Our work provides the groundwork for the commercialization of future meta-devices such as sensors, optical filters/switchers, photodetectors, and energy converters.

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An ultrathin and broadband radar absorber using metamaterials

Cited by 10 publications

References 22 publications

Quad-Band Polarization-Insensitive Square Split-Ring Resonator (SSRR) with an Inner Jerusalem Cross Metamaterial Absorber for Ku- and K-Band Sensing Applications

Quad-Band Polarization-Insensitive Square Split-Ring Resonator (SSRR) with an Inner Jerusalem Cross Metamaterial Absorber for Ku- and K-Band Sensing Applications

A five-band terahertz metamaterial absorber with properties of polarization-insensitive and wide-angle tolerance based on bulk Dirac semimetal

Flexible Broadband Metamaterial Perfect Absorber Based on Graphene-Conductive Inks

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