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研究了利用磁性薄膜构造Salisbury屏的可能性及其在微波频段的反射率频率特性 .结果表明 ,利用铁磁性材料在铁磁共振频率附近磁化率具有 χ″ >χ′的特性 ,可以构造出对电磁波有良好吸收性能的磁性Salisbury屏 .通过对铁磁材料高频磁谱物理机理的分析后指出 ,具有弛豫型共振磁谱的铁磁材料可以构造出薄膜型Salisbury屏 ,其厚度为微米甚至亚微米量级 .反射率的频率特性与磁性材料的特征阻抗zr 有关 ,它取决于铁磁共振频率和静态磁化率 .反射率的频率响应显示磁性薄膜Salisbury屏具有较宽的吸收带宽
The possibility of constructing Salisbury screen by using magnetic thin film and the reflectivity frequency characteristics in the microwave frequency band are studied.The results show that the magnetic susceptibility of the ferromagnetic material near the ferromagnetic resonance frequency has a characteristic of χ "> χ, The magnetic Salisbury screen has good absorption properties.After analyzing the physical mechanism of the high-frequency magnetic field of ferromagnetic materials, it is pointed out that the ferromagnetic material with relaxed resonance magnetic resonance spectroscopy can form a thin-film Salisbury screen with a thickness of micrometers or even Submicron order of magnitude The frequency response of the reflectivity is related to the characteristic impedance zr of the magnetic material and depends on the ferromagnetic resonance frequency and the static magnetic susceptibility The frequency response of the reflectivity shows that the magnetic thin film Salisbury screen has a broad absorption bandwidth