核壳粒子复合材料电磁波吸收层的吸波特征数值模拟

Numerical study on the characteristics of electromagnetic wave absorbing for composite materials with core-shell particles

基于电磁波吸收和反射的基本理论,在探讨核壳粒子复合材料的等效电磁参数的基础上,针对核壳粒子复合材料的电磁波吸收层的吸波特征及其厚度的优化设计展开研究.分别探讨了由核壳粒子复合材料组成的单层和双层电磁波吸收层的吸波特征,给出不同入射角下功率反射系数与电磁波波长以及吸收层厚度之间的关系,确定其最佳电磁波吸收厚度.通过比较可以得出在同等条件下,含核壳粒子吸收层的吸收性能明显优于传统的常规材料吸收层.

Based on the basic theories of absorption and reflection of electromagnetic wave, the effective magnetic permeability and permittivity of composite materials with core-shell particles are given in this paper. Some electromagnetic wave absorbing properties for single and double layered absorbers and the optimized designs for thicknesses of each layer of absorbers, which are made up of the composite materiMs with coreshell particles, are studied respectively. The effects of incident angle, the wavelength of the electromagnetic waves and the thickness of absorbers on the reflection coefficient are discussed; the optimized thicknesses of each layer of absorber having the maximum of the reflection coefficient are obtained. Through comparison, it is found that the absorption capabilities of absorbers with core-shell particles are better than those without core-shell particles.