多晶铁纤维吸收剂微波电磁参数的各向异性研究

由麦克斯韦方程出发，导出了多晶铁纤维吸收剂微波电磁参数的理论计算公式，通过数值分析，阐述了多晶铁纤维吸收剂微波电磁参数的各向异性.通过纤维取向样品的制备和测试，实验验证了电磁参数的各向异性.理论和实验研究均表明，多晶铁纤维吸收剂的微波电磁参数具有明显的形状各向异性，其轴向磁导率大于径向磁导率，轴向介电常数大于径向介电常数. 关键词：

Study of the Anisotropy of Microwave Electromagnetic Parameters of Polycrystalline Iron Fiber Absorber

Based on Maxwell equations, the theoretical formulas of microwave electromagnetic parameters of polycrystalline iron fiber absorber are dervied. The anisotropy of microwave electromagnetic parameters of polycrystalline iron fiber absorber is explained by use of numerical calculations. Some samples of fiber orientation have been produced and their electromagnetic parameters have been tested, the results confirm the anisotropy of electromagnetic parameters. Both of the theoretical and experimental results demonstrate that the axial permeability of polycrystalline iron fiber is greater than its radial permeability, and the axial permittivity of polycrystalline iron filber is greater than its radial permittivity.