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根据电磁波传播规律,设计了具有阻抗渐变结构的三层平板吸波体．面层由二氧化钛材料组成,易于实现与空气波阻抗匹配,且起到一保护屏作用；底层为强磁损耗体,由铁、钴等原料,经球磨而制得的磁性微粉,形成对电磁波强大的损耗；中间层为过渡层,构成从面层、中间层、底层的阻抗渐变结构．采用磁性微粉与碳纤维按一定比例混合,因而还具有一定的电磁损耗能力．实验结果表明,三层吸波体反射率在-8dB以下((8～18)GHz),拉伸强度10．8MPa,剥离强度75．2 N/cm,满足一定的工程应用．
According to the rule of electromagnetic wave propagation, a three-layer flat absorber with impedance gradient structure is designed. Surface made of titanium dioxide material, easy to achieve with the air wave impedance matching, and play a role in the protection of the screen; the underlying layer is a strong magnetic loss, from iron, cobalt and other raw materials, the magnetic powder obtained by ball milling, the formation of strong electromagnetic waves Of the loss; the middle layer is the transition layer, forming from the surface layer, the middle layer, the bottom of the impedance gradient structure. The use of magnetic powder and carbon fiber by a certain percentage of mixing, which also has a certain ability of electromagnetic losses. The experimental results show that the reflectivity of the three-layer absorber is less than -8dB ((8-18) GHz), the tensile strength is 10.8MPa and the peel strength is 75.2 N / cm, which meets certain engineering applications.