Three-Dimensional Printing of Honeycomb Microwave Absorbers: Feasibility and Innovative Multiscale Topologies

Laur, Vincent; Maalouf, Azar; Chevalier, Alexis; Comblet, Fabrice

doi:10.1109/temc.2020.3006328

Cited by 23 publications

(12 citation statements)

References 22 publications

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“…The measurement was carried out using a configuration where a metal plate is fixed to the back of the sample, resulting in a perfect reflector. Figure 3 behavior was proposed by Laur et al 44 with honeycomb structures based on PLA filled with carbon particles and also by our group with neat PLA honeycomb structures. 45 PLAc-based MHS presented larger EAB than PLA-based MHS due to the presence of the conducting filler in the matrix that contributed for improving the EM scattering and multi-reflection.…”

Section: Characterization Methodssupporting

confidence: 77%

3D printed honeycomb bilayer structures based on polylactic acid as lightweight microwave absorbing materials

Schmitz,

Santana,

Barra

et al. 2024

Polymers for Advanced Techs

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Abstract3D printed honeycomb structures constituted by neat polylactic acid (PLA) and conductive PLA (PLAc) with different cell sizes and thicknesses were manufactured through 3D printing technology based on material extrusion (MEX). These structures were arranged into bi‐layer honeycomb structures (BHS) for evaluation of the microwave absorbing properties at the X‐band (8.2–12.4 GHz) and Ku‐band (12.4–18 GHz) frequency ranges. The effects of cell size, sample thickness, layer thickness ratio and the nature of the top layer on the electromagnetic attenuation performance of BHS samples were investigated in terms of reflection loss (RL). The components geometric characteristics and the arrangement of the layers exerted great influence on the RL values and effective absorption bandwidth (EAB). Overall the bilayer structures with 5 mm total thickness presented the best EM response in terms of EAB and minimum RL, where the component with the larger cell size (7.7 mm), PLAc (1 mm) as the top layer and PLA (4 mm) as the bottom layer exhibited the best results with RL values of −41 dB and EAB of 9.5 GHz. The BHS system with 7.7 mm cell size was more efficient in Ku band frequency range, whereas that with 3.5 mm cell size gave better response in the X‐band frequency range. Therefore, RL values and EAB can be adjustable by modifying the building strategy of the printed parts, such as thickness of the sample, cell size and thickness distribution of the conductive and non‐conductive layers. The findings in this work show the importance of the building strategy to fabricate components with controllable BHS and improved properties for microwave absorption application.

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Section: Characterization Methodssupporting

confidence: 77%

3D printed honeycomb bilayer structures based on polylactic acid as lightweight microwave absorbing materials

Schmitz,

Santana,

Barra

et al. 2024

Polymers for Advanced Techs

View full text Add to dashboard Cite

show abstract

Section: Resultsmentioning

confidence: 99%

“…[30] It is important to mention, however, that there is an experimental rule for the metal shielding mesh design which suggests that the diameter of the opening should not be larger than 1/5 of the incident wavelength to guarantee its effectiveness as a shield. [51] The main EM absorbing parameters are summarized in Table 4. As it can be seen, the structures corresponding to Series I and Series II presented higher EM attenuation (lower RL values) when HC with 5 mm thickness was employed.…”

Section: Microwave Absorbing Properties Of Single Honeycomb and Multi...mentioning

confidence: 99%

“…Considering the cell size, they observed that smaller sizes tend to enhance the RL of the absorber, which was attributed to its denser pore structure. Laur et al [ 51 ] analyzed the influence of three different cell sizes on the RL of honeycomb samples made by FFF with conductive PLA. The RL peak shifted to higher frequencies with the decrease in cell size.…”

Section: Introductionmentioning

confidence: 99%

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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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“…By contrast, three-dimensional metamaterials based on dielectric materials have the advantage of low weight. Dielectrics commonly used in metamaterials include carbon-based composites [8][9][10][11][12][13], honeycomb [14], low-loss microwave ceramics [15], and water [16]. Lightweight carbon-based composites benefit from higher dielectric losses, making metamaterial structures easier to achieve low profile and broadband absorption.…”

Section: Introductionmentioning

confidence: 99%

Lossy dielectric resonator array absorber made of multiwalled carbon nanotubes/epoxy composite

Zhou,

Liu,

Zeng

et al. 2023

J. Phys. D: Appl. Phys.

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A cylindrical lossy dielectric resonator array absorber is designed and verified by experiments. The designed cylindrical resonator array is made of a lightweight carbon multiwalled nanotube/epoxy (MWCNT/EP) composite material, and the gaps filled with polypropylene (PP) are used to fix the cylindrical array. Studies have shown that the lossy dielectric resonator array structure has dual-mode resonance characteristics, and the hybrid array composed of cylinders with different diameters can further generate multi-resonant coupling effects, thereby significantly improving the absorptivity. The total thickness of the designed absorber is 4 mm, and the normal incidence absorptivity is greater than 97% in the frequency range of 8-12 GHz. The measured results are consistent with the simulation, which verifies the reliability of the design concept and preparation method.

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Three-Dimensional Printing of Honeycomb Microwave Absorbers: Feasibility and Innovative Multiscale Topologies

Cited by 23 publications

References 22 publications

3D printed honeycomb bilayer structures based on polylactic acid as lightweight microwave absorbing materials

3D printed honeycomb bilayer structures based on polylactic acid as lightweight microwave absorbing materials

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

Lossy dielectric resonator array absorber made of multiwalled carbon nanotubes/epoxy composite

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