Broadband microwave absorption properties of polyurethane foam absorber optimized by sandwiched cross-shaped metamaterial

He, Longhui; Deng, Lianwen; Luo, Hang; He, Jun; Li, Yuhan; Yu, Xu; Huang, Shengxiang

doi:10.1088/1674-1056/27/12/127801

Cited by 16 publications

(5 citation statements)

References 38 publications

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“…With the development of multi-standard communication systems, the multi-band MMA with 'thin, light, wide, and strong' absorption plays a vital role in multi-band military stealth, radio-frequency and microwave circuits, and detection imaging devices [28,29]. The performance of early MMAs is mostly narrow-band single-frequency absorption, which is increasingly unable to adapt to the complex and changing electromagnetic environment.…”

Section: Introductionmentioning

confidence: 99%

Dual-band metamaterial absorber with stable absorption performance based on fractal structure

Fang¹,

Deng²,

Zhang³

et al. 2021

J. Phys. D: Appl. Phys.

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In this paper, two kinds of dual-band metamaterial absorbers (MMAs) with stable absorption performance based on fractal structures are proposed. As the key feature, with the increase in fractal order, the fractal MMAs can reduce the weight while keeping the absorption performance. The multi-band absorption property is analyzed by multiple L-C resonances generated by the fractal structure. By virtue of good impedance matching characteristics and the synergy of the circuit and electromagnetic resonance, effective and stable microwave absorption is readily achieved. Finally, two prototypes are fabricated for demonstration, and the measurement result is consistent well with the simulation one. As expected, the proposed fractal MMAs have the advantage of low-cost, light-weight, and dual-effective absorption bands, and have great potential in the application of multi-band radar stealth.

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Section: Introductionmentioning

confidence: 99%

Dual-band metamaterial absorber with stable absorption performance based on fractal structure

Fang¹,

Deng²,

Zhang³

et al. 2021

J. Phys. D: Appl. Phys.

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“…RL of SiC f gets peak value −9.42 dB at 12.96 GHz, , where 1 represents the impedance of absorber equals to free space while 0 means the phase of incident E, H field are the same at the interface. 26) The central symmetry C-DFRMA is not sensitive to polarization angle j shown in Fig. 3(c).…”

mentioning

confidence: 89%

Broadband absorbing property of the composite by fractal gap-square-ring metasurface and dielectric layers

Li,

Yang,

Qiu

et al. 2023

Appl. Phys. Express

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The fractal gap-square-ring (FGSR) pattern metasurface is combined with silicon carbide fibre (SiCf) as dielectric loss layers, and the composite double-layer fractal gap-square-ring metamaterial absorber (C-DFRMA) presents broadband microwave absorption performance till the incident angle up to 45°. Reflection loss (RL) is better than -10 dB in 8.32~15.68 GHz and peak value reaches -23.36 dB. Relation of RL and permittivity spectrum of dielectric loss layers was investigated by the Debye model. The FGSR pattern metasurface has robustness to permittivity spectrum, benificial to avoiding use of magnetic loss materials. The C-DFRMA provides a new choice as broadband microwave absorber.

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“…Some crucial parameters such as absorption bandwidth, relative bandwidth, periodicity, and thickness of MMA are listed herein. Compared with other MMAs, [24][25][26][27] the purposed MMA is flexible and covers the whole Ku, K, Ka bands, and some of X, U bands. Furthermore, due to the pattern is located on the lower surface of the PI layer, the resonance peaks at 13.91 GHz and 37.63 GHz is improved obviously.…”

Section: Fabrication and Measurement Verificationmentioning

confidence: 99%

A flexible ultra-broadband metamaterial absorber working on whole K-bands with polarization-insensitive and wide-angle stability

Wang¹,

He²,

Ding³

et al. 2022

Chinese Phys. B

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For potential military applications, a flexible metamaterial absorber (MMA) working on whole K-bands with total-thickness of 3.367 mm, ultra-broadband, polarization-insensitive, and wide-angle stability is presented based on frequency-selective surface (FSS). The absorber is composed of polyvinyl chloride (PVC) layer, polyimide (PI) layer, and poly tetra fluoro ethylene (PTFE) layer, with a sandwich structure of PVC–PI–PTFE–metal plate. Periodic conductive patterns play a crucial role in the absorber, and in traditional, it is designed on the upper surface of PI layer to form LC resonance. Different from commonly absorber, all the patterns are located on the lower surface of the PI layer in this work, and hence the impedance matching and absorptivity are improved in this purposed absorber. The flexible absorber with patterns on lower surface of the PI layer is compared with that on upper surface of the PI layer, the difference and the reasons are explained by absorption mechanism based on equivalent circuit model, and surface current density and electric field distribution are used to analyze resonance peaks. Absorptivity is greater than 90% in a frequency range of 10.47 GHz–45.44 GHz with relative bandwidth of 125.1%, covering the whole Ku, K, Ka, and some of X, U bands, especially containing the whole K bands from 12 GHz to 40 GHz. Radar cross section (RCS) is reduced at least 10 dB in 11.48 GHz–43.87 GHz frequency ranges, and absorption remained about 90% when the incident angle changed from 0 ° to 55°. The purposed absorber is fabricated, measured, and experiment results show good agreement with theoretical analysis and numerical simulation. After bonded on outer surface of different cylinders with diameters of 200 mm and 100 mm, the absorption of MMA is approximately reduced 10% and 20% respectively, which shows good conformal character with surface of various curvatures. Due to the attractive performance on strong absorption in the whole K-bands, flexible and easy conformal, our design exhibits broad potential application in radar stealth and sensors.

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Broadband microwave absorption properties of polyurethane foam absorber optimized by sandwiched cross-shaped metamaterial

Cited by 16 publications

References 38 publications

Dual-band metamaterial absorber with stable absorption performance based on fractal structure

Dual-band metamaterial absorber with stable absorption performance based on fractal structure

Broadband absorbing property of the composite by fractal gap-square-ring metasurface and dielectric layers

A flexible ultra-broadband metamaterial absorber working on whole K-bands with polarization-insensitive and wide-angle stability

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