Closed-form representation for equivalent electromagnetic parameters of biaxial anisotropic honeycomb absorbing materials

Chen, Haiyan; Shen, Rongbo; Han, Liandi; Zhou, Yang; Li, Fengxia; Lu, Haipeng; Weng, Xiaolong; Xie, Jianliang; Li, Xiaoqiu; Deng, Longjiang

doi:10.1088/2053-1591/ab2020

Cited by 10 publications

(5 citation statements)

References 33 publications

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“…In this design, the incident angle of electromagnetic wave along −x direction is considered. At this time, the incident angle of each point on the curved surface can be calculated from formula (8), and the variation range is 0.23π ∼ 0.4π. The reflection phase variation of the units shown in Figure 6(a) at different incident angles with an incident wave frequency of 10 GHz can be expressed as Figure 6(b).…”

Section: Design Of Structurementioning

confidence: 99%

“…U nder the illumination of radar wave, when strong scattering sources (such as specular surface [1,2], cavity [3,4], and dihedral corner [5,6]) on detected targets are effectively controlled, and more attention should be paid to electromagnetic scattering from surface defects. Among them, the electromagnetic scattering caused by edge is an outstanding problem compared to other defect types which can be repaired by filling and coating material in a small area [7,8]. Therefore, for low Radar Cross-Section (RCS) applications such as stealth technology, antenna, and RCS measurements, the suppression of edge scattering is crucial.…”

Section: Introductionmentioning

confidence: 99%

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A Low RCS Design under a Large Incident Angle for the Curved Surface Edge Considering Edge Effects

2024

PIER Letters

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In the context of the backscatter problem caused by edge diffraction on metallic curved surface, this study proposes a method to mitigate the scattering effect by loading different metasurface structures in four equally divided regions along the surface edge. Based on the design of the loaded metasurface on the curved surface, the interaction between the reflection field on the surface and the diffracted field is regulated by adjusting two key parameters: the reference phase (φ0) at the edge and the phase difference (φ d ) in adjacent regions. By controlling these parameters, reduction in the monostatic radar cross-section (RCS) can be achieved when the metasurface is loaded onto the curved surface. By controlling the reflection phase of a sandwich-like unit structure subjected to oblique incidence of electromagnetic waves, a metasurface that meets the requirements has been designed. Through a comparison and analysis of the near field and monostatic radar cross-section before and after loading the metasurface, the effectiveness of this design method is confirmed. This method is of great significance to control the electromagnetic scattering caused by edge diffraction.

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Section: Design Of Structurementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A Low RCS Design under a Large Incident Angle for the Curved Surface Edge Considering Edge Effects

2024

PIER Letters

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“…By coating or filling hexagonal honeycomb cores with lossy agents, an HSC can become an efficient MAM [ 16 ]. The wave-absorbing performance of an HSC is affected by a series of design parameters, such as thickness, core size and orientation of the honeycomb [ 17 , 18 , 19 ], coating thickness and dielectric properties of the lossy agents [ 20 , 21 , 22 ], and even the fabrication/molding process [ 23 ]. Vast work and progress have been made by using varied lossy agents, including dielectric materials (e.g., carbon black, graphene and multi-wall carbon nanotube) and magnetic materials (e.g., carbonyl iron, ferrite and nickel metal) to fabricate wave-absorbing HSCs with low reflectivity and high absorptivity [ 17 , 21 , 24 , 25 , 26 , 27 , 28 , 29 , 30 , 31 ].…”

Section: Introductionmentioning

confidence: 99%

Study on Microwave Absorption Performance Enhancement of Metamaterial/Honeycomb Sandwich Composites in the Low Frequency Band

Huang

et al. 2022

Polymers

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With the rapid development of electronic technology and modern radar detection system, there is increasingly urgent demand for microwave absorbing composites working efficiently in the low frequency range (e.g., 1–2 GHz). In this work, a type of metamaterial/honeycomb sandwich composite (MHSC) was proposed and fabricated, which exhibited a light weight structure and excellent wave-absorbing performance in the low frequency band. The relationship between the wave-absorbing properties and the design parameters of the composite, such as the thickness of the wave-transmitting skin, the thickness and dielectric properties of the wave-absorbing honeycomb, was systematically investigated. The electromagnetic coupling interference between the honeycomb absorber and metamaterial resonator proved to be a crucial factor that affects synergistic wave-absorbing performance in the low-frequency band. Under the rational design, the incorporation of subwavelength-sized phase-gradient metamaterial units in the composite can significantly improve low-frequency wave-absorbing performance for greater than 5 dB (an increment larger than 100%); and the obtained MHSC exhibits averaged reflectivity (Ra) less than −10 dB in the low frequency band of 1–2 GHz as well as outstanding performance (Ra < −14.6 dB) over an extremely wide frequency range (1–18 GHz). The MHSC reported in this study could be a promising candidate for the key material in high-performance radar stealth and other related applications.

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“…[ 1,2 ] Due to the excellent lightweight, flame resistance, corrosion resistance, thermal stability, and mechanical properties, ARHC has been widely used as a distinctive lightweight structural material in aerospace, high‐speed trains, ships, and many other fields. [ 3–10 ] Meanwhile, compared to the most commonly used aluminum honeycomb core material in the general field, ARHC presents higher specific strength, corrosion resistance, service life, dielectric properties, and so on. Thus, ARHC has been regarded as the ideal lightweight structural material in the aerospace field.…”

Section: Introductionmentioning

confidence: 99%

Research on Acoustic Absorption Properties of Aramid Honeycomb Composite Material Reinforced by Polyimide Foam

Sun

Zhang

et al. 2022

Adv Eng Mater

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To endue sound absorption behavior for aramid honeycomb core (ARHC), isocyanate-based polyimide foam (IBPIF) with excellent thermal insulation and acoustic properties produced by a new formulation of foaming slurry is filled into ARHC by the free foaming route. As a core factor to adjust the cellular structure of IBPIF, the effect of water dosage on the acoustic behavior of IBPIF and IBPIF filled ARHC (IBPIF/ARHC) is studied, and the optimal formula to produce IBPIF/ARHC is filtered out. Results suggest that water dosage effectively regulates the cellular structure of IBPIF. When water dosage is 7.2 g, IBPIF has a large windows opening rate, which plays a positive role in sound absorption performance. IBPIF/ARHC-3 has the best sound absorption property, which possesses a maximum sound absorption coefficient (α) of 0.9 at 1500 Hz. Its average α increases to 0.78 and shows an increase of 680% compared to ARHC. Meanwhile, the density of IBPIF/ARHC is only about 59 kg m À3 . In 300-600 Hz range, IBPIF-3 and ARHC show obvious synergy effects in sound absorption behavior. The average α of IBPIF-3 and ARHC is only 0.3 and 0.06, respectively, and that of IBPIF/ARHC-3 reaches up to 0.42. The thermal insulation performance of ARHC is also improved, and thermal conductivity decreases from 0.067 to 0.047-0.049 W (m K) À1 .

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Closed-form representation for equivalent electromagnetic parameters of biaxial anisotropic honeycomb absorbing materials

Cited by 10 publications

References 33 publications

A Low RCS Design under a Large Incident Angle for the Curved Surface Edge Considering Edge Effects

A Low RCS Design under a Large Incident Angle for the Curved Surface Edge Considering Edge Effects

Study on Microwave Absorption Performance Enhancement of Metamaterial/Honeycomb Sandwich Composites in the Low Frequency Band

Research on Acoustic Absorption Properties of Aramid Honeycomb Composite Material Reinforced by Polyimide Foam

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