Investigation on microwave absorption characteristics of conductive-coated honeycomb absorber

Choi, Jae-Hun; Jang, Minsu; Jang, Woo-Hyeok; Kim, Chun-Gon

doi:10.1016/j.compstruct.2020.112129

Cited by 25 publications

(3 citation statements)

References 43 publications

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“…[21][22][23] Honeycomb sandwich composites are also considered promising candidates for developing microwave absorbing structures due to their high strength-to-weight ratio, and the ability of providing the desired electric and magnetic response just by changing the structure's geometry. [14,[24][25][26][27][28][29][30] Kwak et al [29] investigated the design of a radar-absorbing honeycomb sandwich composite made of layers of a honeycomb core consisting of nickel-coated glass fabric, alternated by thin layers of pristine glass fabric. Their work analyzed how the multilayer impedance matching can be adjusted by changing the thickness and number of layers of the honeycomb sandwich composite.…”

Section: Introductionmentioning

confidence: 99%

Sandwich structures based on fused filament fabrication 3D‐printed polylactic acid honeycomb and poly(vinylidene fluoride) nanocomposites for microwave absorbing applications

et al. 2023

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Polylactic acid (PLA)—based honeycomb samples with different cell sizes and thickness were prepared using the fused filament fabrication (FFF) 3D printing technology and used to build sandwiched multilayer structures consisted of the honeycomb as the core component and poly(vinylidene fluoride) (PVDF) and/or PVDF/carbon nanotube (CNT) nanocomposites as top and bottom layers. The effect of the honeycomb design (cell size and thickness) and the presence and nature of the impedance matching layer on the microwave absorbing properties of the corresponding structures was investigated in the X‐band (8.2–12.4 GHz) and Ku‐band (12.4–18 GHz). For the systems without matching layer or with neat PVDF film as the matching layer, the honeycomb with larger thickness (5 mm) and larger cell size resulted in better electromagnetic wave attenuation but narrow frequency bandwidth with RL below −10 dB. The best combination minimum RL value (−18 to −14 dB) and broad frequency bandwidth with attenuation higher than 90% (around 8 GHz) was achieved with honeycomb of 2 mm thickness sandwiched by PVDF/CNT05 as the matching layer and bottom layer constituted by PVDF/CNT1 film, regardless the cell size of the honeycomb. These results indicate the PLA honeycomb as promising candidate as component for multilayer microwave absorbing materials and open new possibilities of applications of FFF technology for designing flexible, lightweight, and low‐cost materials to be used in both civil and military industries.

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Section: Introductionmentioning

confidence: 99%

Sandwich structures based on fused filament fabrication 3D‐printed polylactic acid honeycomb and poly(vinylidene fluoride) nanocomposites for microwave absorbing applications

et al. 2023

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“…Lattice structures (such as corrugated cores [ 1 ] and honeycomb cores [ 2 , 3 ]) have advantages in load bearing [ 4 ] and impact energy-absorption applications [ 5 , 6 , 7 ], due to their high specific strength and specific energy absorption (SEA). In addition, honeycombs by foam filling or resistive-films attachment [ 8 , 9 , 10 , 11 ] can also have advantages in electromagnetic wave absorption. Jiang et al [ 8 ] designed a honeycomb structure exhibiting broadband absorbing performance with an ultra-thin thickness through 3D printing and silk-screen printing.…”

Section: Introductionmentioning

confidence: 99%

Effect of Absorbent Foam Filling on Mechanical Behaviors of 3D-Printed Honeycombs

et al. 2020

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Polylactic acid (PLA) hexagonal honeycomb structures were fabricated by using 3D-printing technology. By filling with absorbent polymethacrylimide (PMI) foam, a novel absorbent-foam-filled 3D-printed honeycomb was obtained. The in-plane (L- and W-direction) and out-of-plane (T-direction) compressive performances were studied experimentally and numerically. Due to absorbent PMI foam filling, the elastic modulus, compressive strength, energy absorption per unit volume, and energy absorption per unit mass of absorbent-foam-filled honeycomb under L-direction were increased by 296.34%, 168.75%, 505.57%, and 244.22%, respectively. Moreover, the elastic modulus, compressive strength, energy absorption per unit volume, and energy absorption per unit mass, under W-direction, also have increments of 211.65%, 179.85, 799.45%, and 413.02%, respectively. However, for out-of-plane compression, the compressive strength and energy absorption per unit volume were enhanced, but the density has also been increased; thus, it is not competitive in energy absorption per unit mass. Failure mechanism and dimension effects of absorbent-foam-filled honeycomb were also considered. The approach of absorbent foam filling made the 3D-printed honeycomb structure more competitive in electromagnetic wave stealth applications, while acting simultaneously as load-carrying structures.

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“…The reflection loss and bandwidth of honeycomb absorber (HA) mainly depend on factors such as coating thickness and coating material type [18][19][20], but the weight of corresponding absorber will increase. A matching layer is introduced into the top layer of the HA, and the reflection loss is less than −10 dB in the frequency range of 8-12 GHz [21].…”

Section: Introductionmentioning

confidence: 99%

A novel ultra-broadband absorber based on carbon-coated honeycomb panels combined with metamaterials

Wang¹,

Chen²,

Liu³

et al. 2022

J. Phys. D: Appl. Phys.

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In this paper, a radar absorber with composite structure of metsurface /honeycomb is proposed. Carbon coating is used as a loss material, and honeycomb sandwich structure is used as a support layer to enhance mechanical strength. Introducing impedance matching layer in the top layer of honeycomb absorber (HA) can significantly improve the low-frequency absorption performance. The simulation results show that the absorption efficiency of the combined structure absorber can reach more than 90% in the frequency range of 3.65-17.3GHz. We verified the simulation results through experiments. This method provides an idea for the design of ultra-wideband absorber and has a potential application prospect in stealth material design.

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Investigation on microwave absorption characteristics of conductive-coated honeycomb absorber

Cited by 25 publications

References 43 publications

Sandwich structures based on fused filament fabrication 3D‐printed polylactic acid honeycomb and poly(vinylidene fluoride) nanocomposites for microwave absorbing applications

Sandwich structures based on fused filament fabrication 3D‐printed polylactic acid honeycomb and poly(vinylidene fluoride) nanocomposites for microwave absorbing applications

Effect of Absorbent Foam Filling on Mechanical Behaviors of 3D-Printed Honeycombs

A novel ultra-broadband absorber based on carbon-coated honeycomb panels combined with metamaterials

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