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以碳纤维为填充物,环氧树脂为基体,制备了碳纤维/环氧树脂介电复合材料.介绍了两种分布方式对复合材料介电性能的影响,分别研究了两种分布方式的介电常数随碳纤维含量和长度的变化规律.在2.6～8.2 GHz频率范围内,轴向介电常数是径向介电常数的数倍;实部和虚部都随着碳纤维含量的增加而增大;碳纤维长度也对介电性能的各向异性影响显著.双层微波传输带模型可以合理地解释这些规律.
The carbon fiber / epoxy resin matrix was used to prepare the carbon fiber / epoxy resin composites. The influence of the two kinds of distribution methods on the dielectric properties of the composites was introduced. The dielectric constant With the variation of carbon fiber content and length. In the frequency range of 2.6 ~ 8.2 GHz, the axial dielectric constant is several times of the dielectric constant of the radial direction; the real part and the imaginary part increase with the increase of the carbon fiber content; The length also has a significant effect on the anisotropy of the dielectric properties, and the double-layer microstrip model can reasonably explain these laws.