Effective permittivity of artificial material composed of metal particles — A generalized picture
Effective permittivity of artificial material composed of metal particles — A generalized picture
复制标题
由金属颗粒组成的人造材料的有效介电常数——概括图
DOI：
10.1109/secon.2011.5752936
复制
发表时间：
2011
期刊：
影响因子：
--
通讯作者：
Morris Charise
中科院分区：
文献类型：
--
作者：
A. Saha;Morris Charise
从等效电路模型中得出了广义公式，用于描述由周期性嵌入主介电介质中的哑铃形金属颗粒组成的人造材料的有效介电常数。有效介电常数的理论值与 HFSS 模拟获得的数值结果吻合良好。这项工作表明，人造材料可以通过控制其组成颗粒的尺寸和形状来实现高材料常数，这一事实已通过模拟得到验证。模拟还表明，所提出的材料具有截止频率，低于该频率材料是透明的，这主要取决于粒子间隙。在其特殊情况下，广义模型简化为细线介质的 Pendry 模型。
A generalized formulism has been derived from an equivalent circuit model for describing the effective permittivity of an artificial material composed of dumbbell-shaped metal particles embedded periodically in a host dielectric medium. Theoretical value of effective permittivity compare well with numerical results obtained from HFSS simulation. The work shows that artificial material can achieve high material constant by controlling the size and shape of its constituent particles, a fact verified by the simulation. The simulation also shows that the proposed material has a cut off frequency, below which the material is transparent, that depends mainly on the particle gaps. In its special case, the generalized model reduces to Pendry's model for thin wire medium.