Numerical study of a broadband metamaterial absorber using a single split circle ring and lumped resistors for X-band applications

Nguyen, Thi Quynh Hoa; Cao, Thanh Nghia; Nguyen, Hugo; Bạch, Long Giang

doi:10.1063/1.5143915

Cited by 52 publications

(28 citation statements)

References 49 publications

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“…Meanwhile, the design of broadband MA based on a planar fractal structure is not efficient in microwave range [34]. Recently, the symmetry structures based on lumped elements can be considered as an emerging and promising alternative for designing the broadband absorber with large enough bandwidth, high efficiency, and polarization insensitivity [36], [37], [38], [39], [40], [41], [42]. Li et al proposed the thin and polarization-insensitive wideband MA formed by loading eight lumped resistors into double octagonal rings, which showed a 9.25 GHz-wide absorption from 7.93 to 17.18 GHz with absorptivity larger than 90%, however, the angular stability is still small below 20 o [36].…”

Section: Introductionmentioning

confidence: 99%

Simple Design of a Wideband and Wide-Angle Insensitive Metamaterial Absorber Using Lumped Resistors for X- and Ku-Bands

et al. 2021

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We report a wideband and polarization-/wide-angle insensitive metamaterial absorber based on a symmetry structure associated with surface mount resistors. The proposed structure consists of a periodic array of a top metal symmetry resonator loading with four lumped resistors and a continuous metal ground plane separated by a dielectric substrate of FR-4. A prototype of the proposed absorber is fabricated and measured, confirming a good agreement between the measurement and simulation results. The proposed absorber shows polarization-insensitive behavior and the absorption response in a frequency range from 8-18 GHz covering the entire X-and Ku-bands with an absorptivity above 80% for a wide incident angle up to 40 o for both transverse electric and transverse magnetic polarizations. Compared with the reported broadband absorbers using lumped resistors, our proposed absorber exhibits excellent characteristics in terms of compact and simple structure, high relative absorption bandwidth, and polarization and wide-incident insensitivity. Therefore, this design shows promising potential for both X-and Ku-band applications.

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Section: Introductionmentioning

confidence: 99%

Simple Design of a Wideband and Wide-Angle Insensitive Metamaterial Absorber Using Lumped Resistors for X- and Ku-Bands

et al. 2021

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“…Another important future application is the broadband MPA, due to the standard requirements in modern electronic devices integrated with MMs. Although some approaches for fabricating a broadband absorber have proven to be effective (for example, lumped resistors [19,20] and multiple resonators [21]), these require a complex fabrication process and a large unit-cell size.…”

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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“…Another approach, by incorporating lumped elements into the MM resonators, was used in order to realize a broadband MM absorber [ 50 , 51 , 52 , 53 , 54 , 55 , 56 , 57 ]. It aims to match the input impedance with free space in a wide frequency range.…”

Section: Introductionmentioning

confidence: 99%

“…It aims to match the input impedance with free space in a wide frequency range. In [ 50 ], for example, a Split Circle Ring (SCR) that was loaded with four lumped resistors, with R = 250 Ω, was proposed for X-band applications. MM without lumped resistors provides two resonances at 8.5 GHz and 12.5 GHz with absorptions of 26.1% and 93.9%, respectively, while the same MM structure with four lumped resistors exhibits a broadband absorption performance with absorption higher than 90% in the frequency range of 7.8–12.6 GHz [ 50 ].…”

Section: Introductionmentioning

confidence: 99%

“…As mentioned before, different methods were used to broaden the absorption bandwidth, but most of them failed to meet all of the aforementioned requirements simultaneously. In other words, the design of broadband microwave MM was mostly focused on one or two frequency bands among the C-band (4–8 GHz) [ 40 , 59 ], X-band (8–12 GHz) [ 15 , 50 , 60 ], Ku-band (12–18 GHz) [ 41 ], or K-band (18–27 GHz) [ 46 ], whereas only few MM designs for absorption in the S-band (2–4 GHz) [ 12 , 52 ] have been reported so far. For the S-band, as the EM wave has the narrowest beam width, it is considered to be an excellent candidate for radar detection.…”

Section: Introductionmentioning

confidence: 99%

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Toward an Ultra-Wideband Hybrid Metamaterial Based Microwave Absorber

et al. 2020

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In this paper, we propose a novel design of an ultra-wideband hybrid microwave absorber operating in the frequency range between 2 GHz and 18 GHz. This proposed hybrid absorber is composed of two different layers that integrate a multiband metamaterial absorber and a lossy dielectric layer. The metamaterial absorber consists of a periodic pattern that is composed of an arrangement of different scales of coupled resonators and a metallic ground plane, and the dielectric layer is made of epoxy foam composite loaded with low weight percentage (0.075 wt.%) of 12 mm length carbon fibers. The numerical results show a largely expanded absorption bandwidth that ranges from 2.6 GHz to 18 GHz with incident angles between 0° and 45° and for both transverse electric and transverse magnetic waves. The measurements confirm that absorption of this hybrid based metamaterial absorber exceeds 90% within the above-mentioned frequency range and it may reach an absorption rate of 99% for certain frequency ranges. The proposed idea offers a further step in developing new electromagnetic absorbers, which will impact a broad range of applications.

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Numerical study of a broadband metamaterial absorber using a single split circle ring and lumped resistors for X-band applications

Cited by 52 publications

References 49 publications

Simple Design of a Wideband and Wide-Angle Insensitive Metamaterial Absorber Using Lumped Resistors for X- and Ku-Bands

Simple Design of a Wideband and Wide-Angle Insensitive Metamaterial Absorber Using Lumped Resistors for X- and Ku-Bands

Flexible Broadband Metamaterial Perfect Absorber Based on Graphene-Conductive Inks

Toward an Ultra-Wideband Hybrid Metamaterial Based Microwave Absorber

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