Analytical antenna model for chiral scatterers: Comparison with numerical and experimental data
Analytical antenna model for chiral scatterers: Comparison with numerical and experimental data
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DOI：
10.1109/8.504309
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发表时间：
1996-07-01
影响因子：
5.7
通讯作者：
Heliot, JP
中科院分区：
文献类型：
--
作者：
Tretyakov, SA;Mariotte, F;Heliot, JP
本文提出并讨论了自由空间和有耗介质中手征导电小粒子极化率并矢的解析模型。手性粒子的模型由一个连接到两个直线元件的线环。电磁分析是基于用代表导线和回路部分的两个连接的天线替换颗粒。本文给出了极化率的解析表达式。对于电小粒子，可以构造集总元件等效电路，极化率可以用等效电路参数表示。结果表明，散射体的线环天线模型满足互易条件等基本物理要求，近似的解析表达式进行了比较，数值模拟和实验数据从单个手性粒子的反射，结果被认为是在良好的协议。该模型可用于手性和Ω复合材料的分析建模。
An analytical model for polarizability dyadics of small chiral conductive particles in free space or those embedded in a lossy material is presented and discussed. Chiral particles are modeled by a wire loop connected to two straight wire elements. The electromagnetic analysis is based on the replacement the particles by two connected antennas representing the wire and loop portions. Analytical expressions for polarizabilities are given, For electrically small particles, a lumped-element equivalent circuit can be constructed and the polarizabilities can be expressed in terms of equivalent circuit parameters, It Is shown that the wire-and-loop antenna model for scatterers satisfies the reciprocity condition and other basic physical requirements, Approximate analytical expressions are compared with numerical simulations and with the experimental data on reflection from single chiral particles, and the results are seen to be in good agreement. The model can be used in analytical modeling of chiral and omega composite materials.