Modified hexagonal triple-band metamaterial absorber with wide-angle stability

Pandey

et al. 2021

Journal of Elec Materi

In this study, an ultra-compact metamaterial absorber (MMA) has been proposed for microwave applications comprising two modified square-shaped resonators printed on a dielectric substrate and terminated by a metallic plane. The proposed MMA exhibits perfect absorption at 3.36 GHz, 3.95 GHz and 10.48 GHz, covering Sand X-band applications. The absorber is ultracompact (0.112 k) in size and ultra-thin (0.018 k) in thickness at the lowest resonating frequency. The normalized impedance, constitutive electromagnetic parameters, electric field and surface current distribution have been studied to understand the physical mechanism of the triple-band absorption. Furthermore, the absorber is analyzed with different polarization and incident angles for transverse electric waves. The proposed MMA has been experimentally demonstrated to verify the results obtained from simulations. Moreover, the effect of over-layer thickness is investigated to examine the sensing application of the absorber.

Section: Resultssupporting

confidence: 55%

An Ultrathin Compact Polarization-Sensitive Triple-band Microwave Metamaterial Absorber

Jain

Pandey

et al. 2021

Journal of Elec Materi

“…Nowadays, microwave absorbers have been extensively investigated from few gigahertz to optical frequency ranges for various potential applications. In the past few years, significant research has been carried out in the design of single band, dual band, and multiband . Author Dincer et al analyzed the properties of single band absorber theoretically, numerically, and experimentally.…”

Section: Introductionmentioning

confidence: 99%

“…In view of this, Chaurasiya et al, investigated a triple band polarization‐insensitive metamaterial absorber along with their parametric analysis. Huang et al, and Asgharian et al, reported compact metamaterial absorbers, however, the perfect absorption is not achieved. Moreover, number of researchers explored various multiband polarization insensitive absorbers in References , however the size, absorption rate, and thickness are still scope of improvement.…”

Section: Introductionmentioning

confidence: 99%

“…Subsequently, equivalent circuit model of the proposed absorber is drawn with the help of surface current distributions and electric field distributions. The comparison between proposed absorber and other available designs in References are given in Table . From Table 1, it is confirmed that the proposed design in very prominent structure in terms of size, thickness, high peak absorption, and ease of fabrication.…”

Section: Introductionmentioning

confidence: 99%

“…In the past few years, significant research has been carried out in the design of single band, 7 dual band, [8][9][10] and multiband. [11][12][13][14][15][16] Author Dincer et al 7 analyzed the properties of single band absorber theoretically, numerically, and experimentally. However, the large electrical footprint and thickness of the absorber will restrict their application, where confined and flexible geometries are required.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Design and analysis of a compact ultrathin polarization‐ and incident angle‐independent triple band metamaterial absorber

Kaur

Micro & Optical Tech Letters

2020

This article reports a compact ultrathin metamaterial absorber with three resonances in S‐band, X‐band, and Ku‐band. The geometry of the proposed absorber consists of a square ring, a splitted square ring, and a plus shaped resonating structure. The plus shaped structure is enclosed within a split ring resonator and it is further enclosed by an outer square ring. The proposed absorber is fabricated on a low cost FR4 substrate of thickness 1 mm that is, 0.011 λlowest (where, λ is the lowest resonating frequency). The size of unit cell is 10 × 10 mm2. It exhibits 99.6%, 99.1%, and 99.1% absorption at 3.4, 9.6, and 13 GHz, respectively. Moreover, the physical insight of the design is explained by surface current distribution and equivalent circuit analysis. Stability of the proposed design is validated with different incident (for transverse electric (TE) and transverse magnetic (TM) modes) angles and different polarization angles. Finally, a prototype of the absorber is fabricated and validated experimentally.

Theoretical and experimental study of angle independent conformal tri‐band metamaterial absorber design for industrial and defense applications

Int J RF Mic Comp-Aid Eng

Gupta

2022

In this paper, a novel ultra-thin, conformal, triple band metamaterial absorber (MMA) which provides polarization insensitivity along with wide angle stability for C, X, and Ku frequency band applications is presented. The proposed MMA comprises of the modified square ring, circular ring, and two combined identical swastik shaped structures. The calculation reveals that the suggested MMA is capable of providing triple band operations with near unity absorptions of 99.81, 99.77, and 99.68% at 5.20 GHz (C-band), 9.99 GHz (X-band), and 14.56 GHz (Ku-band), respectively. The corresponding full width at half maximum (FWHM) bandwidths are 180 MHz (5.11-5.29 GHz), 320 MHz (9.83-10.15 GHz), and 560 MHz (14.28-14.84 GHz) respectively. The intended unit-cell is very compact (0.135λ 0 Â 0.135λ 0 ) and showing ultra-thin (0.0104λ 0 ) feature.Polarization insensitivity is ensured by means of quadruple symmetry of the proposed unit cell. It is found that the absorptivity greater than 80% is maintained up to 60 for transverse electric (TE) modes and 75 for transverse magnetic (TM) modes. Therefore, it can be stated that it provides excellent wide incidence angle stability. Moreover, adoption of 0.6 mm thick substrate makes it suitable to be employable in defense applications where conformability is a crucial issue.