High‐efficiency design of multifunctional radar absorbing honeycomb structures for enhanced ultrathin, broadband, and load‐bearing performance

Polymer Composites, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 13, 2025

Abstract With the rapid advancements in anti‐stealth technology and electronic reliability, radar absorbing structures urgently need to achieve electromagnetic‐mechanical enhancement. However, drawback of current frequency selective surface (FSS) film still affects interfacial strength structures, limiting improvement mechanical performance. This work proposed an ultrathin, broadband, load‐bearing integrated honeycomb structure (RAHS), fabricated via a high‐efficiency multi‐manufacturing approach, replacing traditional FSS film. The result reveals that optimizing structural geometry resistance interlocked functional (F‐HC), FSS‐laminate, polylactic acid lattice cores, optimal RAHS can excellent absorption bandwidth 35.30 GHz (absorptivity>87%) under TE polarization at thickness only 9 mm with density 0.55 kg m −3 as well possess outstanding compressive 21.9 MPa energy 6.43 MJ , increasing 200% compared RASH (without cores). Notably, electromagnetic mechanism demonstrates synergistic effects originate from loss capabilities F‐HC L‐C resonance between square loop patch, gradient impedance matching FSS‐laminate cores. multi‐stage effect hexagonal cores significantly enhances provides pathway for achieving high‐performance structures. Highlights is designed integration. approach effectively resolved drawbacks Filling enhanced by 200%, 793%. performance RAHS. Electromagnetic synergy improved broadband

Language: Английский

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Inverse design of material, structure, and process for dielectric properties of additively manufactured PLA/BaTiO3 polymer composites

Composites Communications, Journal Year: 2025, Volume and Issue: unknown, P. 102314 - 102314

Published: Feb. 1, 2025

Language: Английский

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Enhanced Electromagnetic Wave Absorption Performance in Carbon Fiber via Continuous Surface Modification with Layered Double Oxides

Journal of Alloys and Compounds, Journal Year: 2025, Volume and Issue: unknown, P. 180016 - 180016

Published: March 1, 2025

Language: Английский

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Magnetic isocyanate-based polyimide composite foam for efficient microwave absorption

Composites Part B Engineering, Journal Year: 2024, Volume and Issue: unknown, P. 112011 - 112011

Published: Nov. 1, 2024

Language: Английский

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3D metamaterial broadband microwave absorber covered by structural topology-based pixelated color-changing layer

Applied Physics Letters, Journal Year: 2025, Volume and Issue: 126(1)

Published: Jan. 2, 2025

With rapid advancement in ISR (intelligence, surveillance, and reconnaissance), the demand for multispectral stealth technology has become urgent. In field of radar stealth, 3D metamaterial absorbers have garnered significant attention due to their ultra-wideband microwave absorption. However, they face challenge restricted multispectral-compatible capabilities, elevating risk being detected under technology. this study, we propose a solution by covering absorber with structural topology-based pixelated color-changing layer (STPCL), providing environmental camouflage enhancing absorption intensity. Multiwall carbon nanotubes/spherical carbonyl iron/silicone rubber composites thermochromic capsules/polydimethylsiloxane are used fabricate STPCL, respectively. The STPCL not only provides adaptive grassland desert environments but also increases characteristic dimensions tune peaks incorporates grading circuit stepped impedance enhance matching. As result, bandwidth is slightly extended from 3.28–40 2.87–40 GHz, while average reflection loss improved −13.55 −16.83 dB. This approach demonstrates potential functionality adaptability diverse operational environments.

Language: Английский

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Design-manufacturing-evaluation integrated of microwave absorption metastructure based on large variation genetic-ant colony fusion optimization algorithm and additive manufacturing

Composites Communications, Journal Year: 2025, Volume and Issue: unknown, P. 102264 - 102264

Published: Jan. 1, 2025

Language: Английский

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Synergizing Radiation Regulation and Cross‐Band Stealth with Passive Folded Metasurfaces

Advanced Functional Materials, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 16, 2025

Abstract Radiation‐stealth integration, merging radiation regulation and scattering suppression into a unified framework, is essential for advanced radar communications stealth technology. However, current state‐of‐the‐art solutions that simultaneously modulate characteristics encounter two main challenges: limited scalability due to high energy demands from active components, constrained bandwidth stemming the inherent incompatibility between scattering. Here, passive folded metasurfaces (PFM) integrate with capabilities, eliminating necessity components while achieving both in‐ off‐band stealth, referred as cross‐band are proposed. The PFM employs hybrid architecture, cascading quad‐focal asymmetric metasurface (QFAM) polarization‐conversion meta‐mirror (PCM) incorporated patterned feed arrays. QFAM leverages local phases polarization selectivity regulate modes generated by encoded‐excited feeds, enabling efficient beamforming reconfiguration without components. Furthermore, synergy PCM dissipates in‐band impinging waves through internal reflections absorptions, undergo destructive interference enabled checkboard‐patterned modulators atop QFAM, stealth. To validate capabilities of proposed PFM, prototype fabricated its versatile radiation‐stealth functionalities, including 1D narrow‐ wide‐beam scanning, 2D beamforming, experimentally demonstrated.

Language: Английский

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Optimization design of patterned rGO metasurface structures guided by electromagnetic simulation towards broadband electromagnetic wave absorption

Composites Part B Engineering, Journal Year: 2025, Volume and Issue: unknown, P. 112378 - 112378

Published: March 1, 2025

Language: Английский

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Combined Experiment and Simulation on Pore Structure of Graphene Aerogel for Microwave Absorption and Thermal Insulation

Composites Part B Engineering, Journal Year: 2025, Volume and Issue: unknown, P. 112397 - 112397

Published: March 1, 2025

Language: Английский

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A Bionic Grooving All‐Cementitious‐Dielectric Metastructure with Unprecedented Wide‐Angle Broadband Electromagnetic Wave Absorption Properties

Advanced Functional Materials, Journal Year: 2025, Volume and Issue: unknown

Published: March 28, 2025

Abstract The absorption performance of electromagnetic (EM) wave absorbing materials deteriorates sharply at large incident angles, particularly angles exceeding 50°. To overcome this challenge, study proposes a bionic grooving all‐cementitious‐dielectric metastructure (ACDMS), yielding more than 34.6 GHz effective bandwidth ( EAB ) over 0°–60° without any agent. effects structural design, geometric parameters, and on the EM response are investigated by numerical simulations experimental characterizations. It is found that ACDMS enables multiple mechanisms under various including electric field redistribution, multi‐axis interference, surface excitation, diffraction/scattering pathways. Experimental results demonstrate 60° angle, even exceeds normal incidence, achieving relative 163%, ‐20 dB (99% absorption) 33.4 GHz, mean reflectivity −23.4 in 1–40 range. RCS simulation environmental testing across fluctuating humidity (40%–80%) temperature (10–220 °C) exposures underscore exceptional potential for practical applications harsh conditions. combination innovative mechanisms, adaptability convenient cement‐based manufacturing process establishes as promising candidate next‐generation absorbers.

Language: Английский

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