电磁功能复合材料行波抑制性能分析OA

The surface wave suppression performance of electromagnetic functional composite materials applied to laminated structures was studied.The influence of electromagnetic parameters(complex permittivity,complex per-meability)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 elec-tromagnetic functional composite was improved without increasing the weight and thickness of the composite materi-als.The results show that both the permittivity and the permeability have an impact on the travelling wave suppres-sion 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 in-creases,the attenuation intensity of both low-and high-frequency surface travelling waves increases.When the thick-ness 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 trav-elling 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.