基于雷达吸波涂层薄、轻、宽、强的要求,以2 mm短切碳纤维为吸收剂,水性聚氨酯为基体树脂,制备了碳纤维吸波涂层,将芳纶纸蜂窝与碳纤维吸波涂层进行匹配,并采用矢量网络分析仪测试了涂层的吸波性能.结果表明,单层碳纤维吸波涂层在厚度较薄时吸波性能较差,添加匹配层后性能有所改善.将不同碳纤维含量的吸波涂层与芳纶纸蜂窝进行匹配,制备了多层匹配碳纤维吸波涂层,涂层的吸收强度和有效吸收带宽均得到明显提升,通过调整碳纤维涂层和芳纶纸蜂窝的匹配方式,复合涂层在4.1~13.6 GHz频率范围内均能实现有效吸收.%Based on the requirements of "thin, light, wide and strong" of radar absorbing coating, the radar absorbing coating was prepared by using short carbon fiber as absorbent and waterborne polyurethane as matrix resin, the aramid honeycomb was used to match with the carbon fiber coating, and the absorbing properties of the coating were tested by the vector network analyzer. The results show that the absorbing properties of single layer carbon fiber absorbing coating are poor when the thickness is thin, and the performance can be slightly improved after the matched layer is adopted. Multilayer matched carbon fiber absorbing coatings were prepared by using the aramid honeycomb to match with carbon fiber absorbing coating with different carbon fiber contents, the absorption intensity and effective absorption bandwidth of the coating were improved obviously. By changing the matching methods, the composite coating can achieve effective absorption in frequency range of 4.1~13.6 GHz.
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