3D Flexible Frequency Selective Surface with Stable Electromagnetic Transmission Properties (Adv. Mater. Technol. 7/2022)

Fan, Xuanqing; Pan, Zijian; Chen, Sihong; Li, Yuhang; Zhao, Zhao; Pan, Taisong

doi:10.1002/admt.202270039

Cited by 3 publications

(9 citation statements)

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“…Combining Equation (1) and Equation (5) leads to

\begin{equation}\frac{{{\mathrm{d}}\theta }}{{{\mathrm{d}}s}} = \pm \sqrt {2\int_{{{\theta }_{\mathrm{A}}}}^{\theta }{{\frac{Q}{{EI\left( {1 + \varepsilon } \right)}}{\mathrm{d}}\theta + {{\left( {\frac{{{M}_{\mathrm{A}}}}{{EI\left( {1 + {\varepsilon }_{\mathrm{A}}} \right)}}} \right)}}^2}}} \end{equation}

where “d s ” satisfies [ 42 ]

\begin{equation}\left\{ { \def\eqcellsep{&}\begin{array}{@{}*{1}{c}@{}} {{\mathrm{d}}{x}^{\prime} = \cos \theta {\mathrm{d}}s}\\ {{\mathrm{d}}{y}^{\prime} = \sin \theta {\mathrm{d}}s} \end{array} } \right.\end{equation}

…”

Section: Resultsmentioning

confidence: 99%

“…Due to the malleable characteristics, the 3D adjustable structure designed for flexible FSS can be mechanically controlled by altering shape. [40][41] Fan et al [42] created and manufactured a flexible FSS that controls EM waves under the biaxial tensile strain of a flexible substrate using a mechanically oriented 3D assembly approach, and the applied strain had little to no effect on the transmission properties. Phon et al [43] designed a rotational kirigami tessellation metasurface with tunable chirality using 2D-to-2D in-plane transformation.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Flexible Double‐Layer Adjustable Frequency Selective Surfaces Based on 3D Cross‐Shaped Kirigami Structure

Zhu,

Dong,

et al. 2024

Adv Materials Technologies

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Frequency‐selective surfaces (FSS) with flexible treatment can be employed in various applications. This paper develops a mechanically constructed flexible double‐layer adjustable FSS based on a 3D cross‐shaped kirigami structure design. Through mechanical stretching, the kirigami structure partly adhered to the ecoflex substrate enables this FSS to modulate the resonant frequencies of two filter bands synchronously. Meanwhile, the structural deformation triggered by mechanical stretching may function as a switch to adjust the filter band with a higher resonant frequency. According to the results of EM experiments and simulations, in the absence of stretching, the undeformed FSS with a double‐layer structure has two filter bands. Compared to the undeformed configuration, the stretching induces structural deformation, which results in apparent resonant frequency shifts of both the two filter bands and the contraction of the filter band with higher resonant frequency. A buckling model that has been theoretically, cumulatively, and experimentally proven is utilized to investigate the structural deformation of this FSS caused by stretching. It is convenient to switch flexible double‐layer adjustable FSS' deformation by mechanical method. This flexible double‐layer adjustable FSS offers a new design strategy for the application of FSS, paving the route for new developments in electromagnetic compatibility.

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“…Combining Equation (1) and Equation (5) leads to

\begin{equation}\frac{{{\mathrm{d}}\theta }}{{{\mathrm{d}}s}} = \pm \sqrt {2\int_{{{\theta }_{\mathrm{A}}}}^{\theta }{{\frac{Q}{{EI\left( {1 + \varepsilon } \right)}}{\mathrm{d}}\theta + {{\left( {\frac{{{M}_{\mathrm{A}}}}{{EI\left( {1 + {\varepsilon }_{\mathrm{A}}} \right)}}} \right)}}^2}}} \end{equation}

where “d s ” satisfies [ 42 ]

\begin{equation}\left\{ { \def\eqcellsep{&}\begin{array}{@{}*{1}{c}@{}} {{\mathrm{d}}{x}^{\prime} = \cos \theta {\mathrm{d}}s}\\ {{\mathrm{d}}{y}^{\prime} = \sin \theta {\mathrm{d}}s} \end{array} } \right.\end{equation}

…”

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Flexible Double‐Layer Adjustable Frequency Selective Surfaces Based on 3D Cross‐Shaped Kirigami Structure

Zhu,

Dong,

et al. 2024

Adv Materials Technologies

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“…[ 42 ] Moreover, the 3D assembly method has recently been adopted to reconfigure 3D morphologies of EM metamaterial from 2D structure that is selectively bonded on the pre‐stretched substrate. [ 43–45 ] Besides the above‐mentioned modulations of the spectral responses, the mechanical strategy has been implemented to modulate the focusing length [ 46 ] and the reflection angle [ 47 ] in the phase‐gradient metamaterials. Compared to the electrically tunable metamaterials possessing fast response speed, [ 48,49 ] the response time of the mechanical methods is delayed owing to the limitations of the mechanical actuator.…”

Section: Introductionmentioning

confidence: 99%

Controllable Deformation Modulated Multi‐Functionality for Phase‐Gradient Metamaterials

Han,

Li,

Liu

et al. 2023

Laser & Photonics Reviews

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Tunable metamaterials offer versatile approaches to achieve the dynamic manipulation of electromagnetic waves with various dimensionality. Recently, mechanical approaches have been extensively employed to construct reconfigurable metamaterials with simple composition and superior mechanical characteristics. Mechanical modulation methods in phase‐gradient metamaterials are even more worthy of being investigated to facilitate valuable applications. Here, an in‐plane rotational deformation principle is proposed to assist the structural design of reconfigurable phase‐gradient metamaterials by integrating split ring resonators (SRRs) on the hyperelastic kirigami substrate. The orientations and split angles of SRRs are explored to manipulate the amplitudes and phases of cross‐polarized transmittance under x‐polarized incidence, respectively. The tensile strains dramatically modulate the amplitudes yet not the gradient phase. As proof‐of‐concept, a reconfigurable metalens is elaborately designed to realize tunable focus location and number by regulating the transmittance amplitudes of meta‐atoms via stretching the kirigami substrate. Furthermore, a holographic metamaterial is developed to perform dynamic hologram on the imaging plane under the strain 0% and 40%. The proposed mechanical deformation principle offers a promising platform for dynamic manipulation of the wavefront and may promote the conformal and flexible designs in certain cases and enlarge the potential applications of meta‐devices in imaging and information encryption.

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“…32 The 3D Flexible FSS with stable electromagnetic transmission properties has been fabricated by releasing pre-strains in the flexible substrate. 33 In addition, buckling the 2D Jerusalem metal precursors locally bonded on it, capable of being conformally adhered to complex surfaces. It can maintain stable frequency-selective properties as well as performance of transmission when subjected to biaxial stretching strains.…”

mentioning

confidence: 99%

“…It can maintain stable frequency-selective properties as well as performance of transmission when subjected to biaxial stretching strains. 33 Active bandstop FSS with independent frequency and amplitude modulations has been proposed for smart applications ranging from electromagnetic shielding to adaptive camouflage systems. 34 The designed structure consists of periodic arrays of split metallic square loops along with varactors and pin diodes on one side of an F4B substrate and printed feed networks on the other side of the substrate as the ground plane.…”

mentioning

confidence: 99%

Investigation of Frequency-Selective Surfaces Based on Graphite in the Absorption of Electromagnetic Waves

Ahmadi

Hesami

Rahmani

2022

ECS J. Solid State Sci. Technol.

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Today, electromagnetic waves play an important role in our lives. These waves are used for radio and television communications, telecommunication networks and all wireless communications. Therefore, due to the widespread use of electromagnetic waves in the GHz range for mobile phones, national networks, radar systems, etc., it is a serious threat to human health. The presence of different electromagnetic fields and waves in space also causes improper operation or reduced efficiency in electrical and electronic circuits and components. Therefore, the issue of designing appropriate and efficient filters to protect electrical devices and maintain human health is doubly important. In this research, metamaterials and their application as absorbers in frequency-selective surfaces are studied. The design and development process of the frequency-selective surfaces based on graphite are presented in two steps. Finally, the performance of proposed structures with one and two hexagonal loops are discussed. The obtained results demonstrate that the base element consists of a hexagonal loop made of graphite filters the frequency band of 8-12 GHz. However, the base element consists of two hexagonal loops is able to filter the frequency band of 4-12 GHz. In fact, the proposed structure with two hexagonal lopps has filtered a larger frequency band.

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3D Flexible Frequency Selective Surface with Stable Electromagnetic Transmission Properties (Adv. Mater. Technol. 7/2022)

Cited by 3 publications

References 0 publications

Flexible Double‐Layer Adjustable Frequency Selective Surfaces Based on 3D Cross‐Shaped Kirigami Structure

Flexible Double‐Layer Adjustable Frequency Selective Surfaces Based on 3D Cross‐Shaped Kirigami Structure

Controllable Deformation Modulated Multi‐Functionality for Phase‐Gradient Metamaterials

Investigation of Frequency-Selective Surfaces Based on Graphite in the Absorption of Electromagnetic Waves

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