Analysis of surface travelling wave suppression performance of electromagnetic functional composite materials

doi:10.19936/j.cnki.2096-8000.20260328.011

Abstract

Abstract: The surface wave suppression performance of electromagnetic functional composite materials applied to laminated structures was studied. The influence of electromagnetic parameters (complex permittivity, complex permeability) and layer thickness on surface wave attenuation was evaluated through simulations. By adopting the method of loading an impedance functional layer, the low-frequency surface travelling wave suppression ability of the electromagnetic functional composite was improved without increasing the weight and thickness of the composite materials. The results show that both the permittivity and the permeability have an impact on the travelling wave suppression effect, and the permeability has a relatively greater influence. With the increase of the permittivity, the surface travelling wave suppression ability of the high-frequency surface waves gradually increases. As the permeability increases, the attenuation intensity of both low- and high-frequency surface travelling waves increases. When the thickness of the material meets the condition of being an odd multiple of a quarter-wavelength, excellent travelling wave suppression performance can be achieved for the material. When the thickness of the material is 1 mm, through the composite design with impedance loading, the suppression coefficients of the travelling wave suppression effect of the material at the frequency points of 1.5 GHz, 3 GHz and 6 GHz can reach 4.41 dB/m, 13.98 dB/m and 27.31 dB/m respectively. Compared with that before the impedance loading, while maintaining the high-frequency surface travelling wave suppression ability, the travelling wave suppression effect of the material is improved by 1.86 dB/m and 4.90 dB/m at 1.5 GHz and 3 GHz respectively, achieving the improvement of the low-frequency surface travelling wave suppression ability, which can effectively guide the regulation of the travelling wave suppression performance of electromagnetic functional composites.

Key words: surface wave attenuation, electromagnetic functional material, permittivity, permeability, impedance loading, composites

CLC Number:

TB332

LI Songming, GUO Wen, WU Sibao, LU Haijun. Analysis of surface travelling wave suppression performance of electromagnetic functional composite materials[J]. COMPOSITES SCIENCE AND ENGINEERING, 2026, 0(3): 92-101.

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