Ultra-wideband water-based metamaterial absorber with temperature insensitivity

Zhou, Yanfei; Shen, Zhaoyang; Huang, Xiaojun; Wu, Jiong; Li, Yujun; Huang, Siqi; Yang, Helin

doi:10.1016/j.physleta.2019.05.050

Cited by 31 publications

(10 citation statements)

References 22 publications

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“…The tolerance of each structural parameter is continued to be analyzed using COMSOL software based on the finite element method. [35][36][37][38] Fig. 6 analyzes the absorption characteristics of an angle change at absorption peaks.…”

Section: Analysis and Discussionmentioning

confidence: 99%

Using Periodic Trapezoidal Ag Strips and Silicon Dioxide Slab for Polarization-Independent Narrowband Absorber

Fu¹,

Wang²

2022

Eng. Sci.

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This paper proposes a perfect electromagnetic absorber composed of a trapezoidal silver metal-dielectric array and a doublelayer base layer. Based on the finite element method, the absorber achieves an absorption efficiency in the near-infrared band of 99.91% under transverse-electric (TE) polarization, and 93.40% under transverse-magnetic (TM) polarization. And the accuracy of this calculation result is verified by the finite difference time domain method. By analyzing the distribution of electric field intensity under other parameters, the mechanism of the structure parameters to affect the absorption efficiency is studied. Finally, the manufacturing tolerance of each structural parameter is calculated when the absorption efficiency is above 90%. Trapezoidal perfect narrow-band absorber can be applied in optical sensor and optical detection.

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Section: Analysis and Discussionmentioning

confidence: 99%

Using Periodic Trapezoidal Ag Strips and Silicon Dioxide Slab for Polarization-Independent Narrowband Absorber

Fu¹,

Wang²

2022

Eng. Sci.

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“…Step 1: S parameters [22], [23] can be related to refractive index (n) and impedance (z) values. The S parameters can be written as ( 4) and (5).…”

Section: Design Of Proposed Unit Cell Absorbermentioning

confidence: 99%

Circular ring shaped ultra-wideband metamaterial absorber with polarization insensitivity for energy harvesting

Paul

Rekh

2022

IJECE

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<span>A circular ring-shaped metamaterial (CRM) absorber was designed to harvest radio frequency (RF) energy in the ultra-wideband (UWB) frequency band applications. The proposed metamaterial unit cell features a circular shaped structure, with rectangular strip lines connected in the form of a cross leaving a square shaped slot at center. The unit cell dimensions are 15×15×1.6 mm. The absorber was etched on a low cost FR4 substrate having a dielectric constant of 4.4. Ansys high frequency structure simulator (HFSS) software was used for simulation and the analysis were carried out for unit cell, 2×2, 3×3, and 4×4 array structures. The absorber parameters plotted are absorption characteristics and reflection characteristics. Also, the metamaterial parameters (μeff) and (εeff) are also retrieved from the absorber parameters and analyzed. From the analysis, the values (μeff) and (εeff) were found to be negative, leaving refractive index also negative (n<0), which proved the metamaterial property. The proposed CRM absorber showed good absorption characteristics of more than 80% and also metamaterial property in the entire UWB band (4-13 GHz). Hence the absorber proves to be a good candidate in powering low power sensors/microcontrollers for internet of things (IoT) applications.</span>

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“…In the same year, Shen et al achieved excellent broadband absorption at 8.3-21.0 GHz for three-dimensional (3D) water substrate arrays by introducing a triangular metal fishbone structure between the water substrate and the dielectric storage layer [33]. In 2019, Zhou et al proposed an I-shaped water-based metamaterial absorber, which achieved broadband absorption with an absorption rate greater than 90% in the range of 7.9-21.7 GHz [34]. The structure has stable absorption at different temperatures and is not sensitive to the incident angle and polarization angle.…”

Section: Introductionmentioning

confidence: 99%

An ionic liquid-based ultra-broadband absorber with temperature stability, polarization insensitivity, and wide incident angle

zhang¹,

Yang²,

Zhang³

et al. 2023

J. Phys. D: Appl. Phys.

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In this paper, an ultra-broadband absorber based on ionic liquids is proposed. It is an absorber that is a fully enclosed resin container, and the resin is filled with an ionic liquids([EMIM][N(CN)2]) with a circular cross-section. The simulation results show that the single-ring absorber can achieve more than 90% absorption in the microwave range of 12.25-50GHz, and the relative bandwidth reaches 121.29%. Based on the theories of equivalent medium and impedance matching, the mechanism of broadband absorption was explored by analyzing the electromagnetic field distribution and power loss density of the absorber. In addition, the absorber exhibits good thermal stability in the range of 20-100 °C, and has the characteristics of polarization insensitivity and wide incident angle. The proposed metamaterial absorber can be fabricated at a low cost, is environment friendly, and may find potential applications in the fields of electromagnetic energy harvesting and stealth technology.

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Ultra-wideband water-based metamaterial absorber with temperature insensitivity

Cited by 31 publications

References 22 publications

Using Periodic Trapezoidal Ag Strips and Silicon Dioxide Slab for Polarization-Independent Narrowband Absorber

Using Periodic Trapezoidal Ag Strips and Silicon Dioxide Slab for Polarization-Independent Narrowband Absorber

Circular ring shaped ultra-wideband metamaterial absorber with polarization insensitivity for energy harvesting

An ionic liquid-based ultra-broadband absorber with temperature stability, polarization insensitivity, and wide incident angle

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