摘要:
为能够较好的计算混合介质等效复介电常数和复磁导率,提出了一种基于等效电路理论的阻抗模拟方法.导出了材料的电磁参数与材料容抗、感抗之间的对应关系,并建立了能够较完整、精确地刻画实际复合材料的模型.通过求解混合介质的等效阻抗,进一步反演其等效电磁参数.将计算结果与经典理论公式以及基于有限差分的数值方法进行了比较,结果都符合得很好,说明该方法可以用于计算材料的等效电磁参数.另外,引入薄膜层结构来刻画表面效应等因素,使得计算结果更加符合实验结果,弥补了经典公式在这方面的不足,同时也体现了该方法在刻画实际模型时所具有的优势.
Abstract:
In order to calculate the equivalent EM parameter of mixed medium, in this paper, we proposes a new method of impedance simulation based on an equivalent circuit. First, the relationship between electromagnetic parameters and capacitance, inductance of material is set up, and then the model that can describe real composite accurately is established. The equivalent EM parameter could be obtained by calculating the equivalent impedance of mixed medium. Comparing this method with the classical formulae and finite-difference numerical method, it is proved that it can be used to calculate the equivalent EM parameter of material. In addition, introducing thin films to simulate the factor such as surface effect, the result of calculation would match with experimental results perfectly. This method has more advantages than classical formulae and numerical method.
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