负媒质模型的时域有限差分法分析
Time-domain analysis of negative refractive index materials by FDTD method
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摘要: 负折射率媒质是一种人造媒质，在某一微波波段内其介电常数和磁导率同时为负值。对TE模电磁场满足的麦克斯韦方程组进行数值处理，解决了直接利用时域有限差分方法在Yee’s网格下计算负折射率媒质内部场分布时的数值发散问题。通过数值算例，验证了方法的可行性，模拟了负折射率媒质内部及周围的电磁场分布。
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关键词:
- 负折射率媒质 /
- TE模 /
- 时域有限差分（FDTD）方法
Abstract: Negative refractive index materials are artificial materials with permittivity and permeability both negative within certain microwave frequency band. FDTD method is used to simulate the distribution of electromagnetic field inside and around the negative refractive index materials by the treated Maxwell’s equations for TE mode. Unstable situation during calculation is avoided. Numerical experiment results of the distribution of electromagnetic fields in the area are given.-
Key words:
- negative refractive index materials /
- te mode /
- fdtd method
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