金属平板覆盖负折射率媒质的电磁波反射系数的PLRC-FDTD分析
PLRC-FDTD analysis on electromagnetic wave reflection coefficients of conductive plate coated with negative refractive index materials
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摘要: 推导了负折射率媒质中的FDTD分段线性递归卷积(PLRC)计算式，并将PLRC-FDTD方法用于仿真电磁波与负折射率媒质的相互作用, 计算了金属平板覆盖负折射率媒质层对垂直入射电磁波的反射系数。数值结果表明：负折射率媒质包层可以极大地减少目标的电磁回波能量，碰撞频率越大，振荡频率越小，其吸波性能越好；负折射率媒质碰撞频率、振荡频率及其分布形式是影响反射系数的重要因素。Abstract: The equations of piecewise linear recursive convolution(PLRC) using finitedifference time-domain(FDTD) method for negativerefractive index materials are presented. The PLRCFDTD method is used to simulate the interaction of electromagnetic wave with negative refractive index materials and calculate the electromagnetic wave reflection coefficients of conductive plate coated with negative refractive index materials. Numerical results indicate that negative refraction index materials cover can greatly reduce the echo energy of targets. The higher the collision frequency and the lower the oscillation frequency, the better the absorption effect. And reflection coefficients are affected by collision frequency, oscillation frequency and distribution form of the material．
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