A multilayered microwave absorbing composite structure enhanced by fiberglass enforced epoxy laminate array

Abstract

A multilayered composite structure with ultra-wideband and strong microwave absorbing performance has been developed, which is prepared through vacuum bag molding process, and the fiberglass enforced epoxy laminate (FEPL) array on its surface is fabricated by computer numerical control (CNC) carving method. The surface density of the whole composite structure with FEPL array is about 2.4 kg/m², and the thickness is about 10.0 mm. Both simulation and measurement results confirm that FEPL array can considerably improve stability of the incidence angle, increase absorptivity, and broaden the absorption bandwidth. The FEPL array enhances the oblique incidence performance of the composite structure ranging from 40° to 60°, while simultaneously expanding the fractional bandwidth (FBW) by approximately 9.1%. Moreover, it achieves a notable reduction in the average reflection coefficient at normal incidence, decreasing it by about 11.3 dB from −14.4 dB to − 25.7 dB. High performance and simple preparation processes for composite structure indicate that it is suitable for practical engineering applications.

Keywords

ultra-wideband / microwave absorption composites / fiberglass enforced epoxy laminate array / circuit-analog array

References

[1] TirkeyM M, GuptaN. A Novel ultrathin checkerboard inspired ultrawideband metasurface absorber [J]. IEEE Transactions on Electromagnetic Compatibility, 2022, 64(1): 66-74

[2] XuS, WangX-r, LiQ-hua. Research on the electromagnetic wave absorbing properties of carbon nanotube-fiber reinforced cementitious composite [J]. Composite Structures, 2021, 274: 114377

[3] HannanS, IslamM T, SolimanM S, et al. . A filling-factor engineered, perfect metamaterial absorber for multiple applications at frequencies set by IEEE in C and X bands [J]. Journal of Materials Research and Technology, 2022, 19934-946

[4] LiY, GuP-f, HeZ, et al. . An ultra-wideband multilayer absorber using an equivalent circuit-based approach [J]. IEEE Transactions on Antennas and Propagation, 2022, 70(12): 11911-11921

[5] ZhuC, ZhangM, QiaoY-j, et al. . Fe₃O₄/TiO₂ core/shell nanotubes: Synthesis and magnetic and electromagnetic wave absorption characteristics [J]. The Journal of Physical Chemistry C, 2010, 114: 16229-16235

[6] GaoS, ZhangG-z, WangY, et al. . MOFs derived magnetic porous carbon microspheres constructed by core-shell Ni@C with high-performance microwave absorption [J]. Journal of Materials Science & Technology, 2021, 88: 56-65

[7] WangG-s, WuY, ZhangX-j, et al. . Controllable synthesis of uniform ZnO nanorods and their enhanced dielectric and absorption properties [J]. Journal of Materials Chemistry A, 2014, 2(23): 8644-8651

[8] LakshmiK, JohnH, MathewK T, et al. . Microwave absorption, reflection and EMI shielding of PU-PANI composite [J]. Acta Materialia, 2009, 57(2): 371-375

[9] YangZ-n, LuoF, ZhouW-c, et al. . Design of a broadband electromagnetic absorbers based on TiO₂/Al₂O₃ ceramic coatings with metamaterial surfaces [J]. Journal of Alloys and Compounds, 2016, 687: 384-388

[10] MunkBFrequency selective surfaces: Theory and design [M], 2000, New York, Wiley

[11] TaydeY, SaikiaM, SrivastavaK V, et al. . Polarization-insensitive broadband multilayered absorber using screen printed patterns of resistive ink [J]. IEEE Antennas and Wireless Propagation Letters, 2018, 17(12): 2489-2493

[12] YaoZ, XiaoS, LiY, et al. . On the design of wideband absorber based on multilayer and multiresonant FSS array [J]. IEEE Antennas and Wireless Propagation Letters, 2021, 20(3): 284-288

[13] WangQ, ZhangF, XiongY-j, et al. . Dualband binary metamaterial absorber based on low-permittivity all-dielectric resonance surface [J]. Journal of Electronic Materials, 2019, 48787

[14] ZhangF, WangQ, ZhouT, et al. . A multiband binary radar absorbing metamaterial based on a 3D low-permittivity all-dielectric structure [J]. Journal of Alloys and Compounds, 2020, 814152300

[15] SimovskiC, MaslovskiS, NefedovI, et al. . Optimization of radiative heat transfer in hyperbolic metamaterials for thermophotovoltaic applications [J]. Optics Express, 2013, 21(12): 14988-15013

[16] SmithD R, VierD C, KoschnyT, et al. . Electromagnetic parameter retrieval from inhomogeneous metamaterials [J]. Physical Review E: Statistical, Nonlinear, and Soft Matter Physics, 2005, 71036617

[17] LinM, YiJ-j, ChenX-m, et al. . Compact multi-functional frequency-selective absorber based on customizable impedance films [J]. Optics Express, 2021, 29(10): 14974-14984

[18] MaZ, JiangC, CaoW-b, et al. . An ultrawideband and high-absorption circuit-analog absorber with incident angle-insensitive performance [J]. IEEE Transactions on Antennas and Propagation, 2022, 70(10): 9376-9384

[19] ZhangH, GongL, YanL, et al. . Design of double-layer absorbers based on CO₂Y@C core-shell nanofibers and carbon nanofibers for high-efficient and tunable microwave absorption [J]. Journal of Magnetism and Magnetic Materials, 2023, 569170394

[20] AshfaqM Z, AshfaqA, GongH, et al. . Controllable synthesis of FeSe₂/rGO porous composites towards an excellent electromagnetic wave absorption with broadened bandwidth [J]. Ceramics International, 2023, 49(4): 5997-6005

[21] ChenH-n, LiuJ-r, XiaoL, et al. . All-dielectric absorbing array based on 3D printing metamaterial [J]. Optical and Quantum Electronics, 2023, 55(6): 561

[22] ParameswaranA, OvhalA A, KunduD, et al. . A low-profile ultra-wideband absorber using lumped resistor-loaded cross dipoles with resonant nodes [J]. IEEE Transactions on Electromagnetic Compatibility, 2022, 6451758-1766