基于有效媒质理论,采用有限元法计算了二维金属-介质壳核结构复合材料模型的等效介电常数.分析了金属层电导率、金属层厚度、填充比、内核材料及衬底介电常数对复合材料等效介电常数的影响.仿真结果表明,金属-介质复合材料具有2个吸收峰,且通过改变金属层电导率可以在射频至红外频段灵活调整复合材料吸收峰的位置;复合材料的吸收峰与其显微结构密切相关.有效介质理论是研究和分析复合材料吸波特性的有力工具.
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