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利用高频电磁场计算软件FEKO对Al薄膜与玻璃纤维增强树脂基复合材料的电磁波反射率进行了仿真计算。研究了复合材料介电常数实部er、电损耗角正切tande、磁导率mr及磁损耗角正切tandm对反射率的影响,并通过仿真计算与实际测试结果对比,确定了仿真模型中玻璃纤维增强树脂基复合材料的等效电磁参数。研究了Al薄膜与玻璃纤维增强树脂基复合材料结构中Al薄膜厚度对反射率的影响,仿真计算与测试结果表明,Al薄膜厚度对复合材料的反射率影响较大,Al薄膜与玻璃纤维增强树脂基复合材料结构中存在一个最佳电阻值,使该结构谐振反射最小。根据传输线理论,利用MATLAB对谐振最强时对应电阻的大小进行了求解。通过计算不同结构的Al薄膜与玻璃纤维增强树脂基复合材料,得到了仿真模型中Al薄膜与磁控溅射制备Al薄膜的厚度关系。确定了仿真模型中各材料的等效电磁参数,仿真计算结果与测试结果吻合较好。
The electromagnetic wave reflectivity of Al film and glass fiber reinforced resin matrix composites was calculated by using FEKO electromagnetic field calculation software. The effects of the real part of dielectric constant er, tanδ, magnetic permeability mr and magnetic tangent tandm on the reflectivity of the composites were investigated. The comparison of the simulation results with the real test results shows that the glass fiber Enhance the equivalent electromagnetic parameters of resin-based composites. The effects of Al film thickness on the reflectivity of Al thin films and glass fiber reinforced resin matrix composites were investigated. The simulation results show that Al thin films have a significant effect on the reflectivity of the composites. Al thin films and glass fiber reinforced resin There is an optimum resistance in the matrix composite structure, which minimizes the resonance of the structure. According to the theory of transmission line, the size of the corresponding resistor is solved by using MATLAB. The thickness relationship between Al film and Al film prepared by magnetron sputtering was obtained by calculating Al films with different structure and glass fiber reinforced resin matrix composites. The equivalent electromagnetic parameters of each material in the simulation model are determined. The simulation results are in good agreement with the test results.