形状任意的超材料电磁隐身波长变换器的设计

目的研究形状任意的超材料电磁隐身波长变换器的设计方法。方法基于坐标变换理论,通过对空间中的不同区域先后进行压缩和扩张变换,设计出该装置不同区域的电磁参数张量。结果一方面,入射波经过该装置时,在其界面不产生散射,并且入射波穿过装置进入外部自由空间时又能恢复其初始传播状态;另一方面,该装置在特定区域改变了电磁波的波长。结论有限元软件的仿真结果显示波长变换器实现了预期的电磁功能,从而验证了该装置电磁参数张量表达式的正确性。

Design of Metamaterial Electromagnetic Invisible Wavelength Transformer with Arbitrary Shape

Objective To study the design method of metamaterial electromagnetic invisible wavelength transformer with arbitrary shape. Methods Based on coordinate transformation theory, by means of compressing certain region and then expanding another one in the space, the electromagnetic tensors of the device in different regions were deduced. Results On one hand, when the incoming waves propagated into the device, there was no scattering on the boundary of the device. And the waves returned to their original propagation when they propagated into the free space from the inner region of the device. On the other hand, the device could change the wavelength of electromagnetic wave in the particular region. Conclusion The simulation results of the software based on finite element method showed that the wavelength transformer realized the anticipated electromagnetic function, which validated the electromagnetic tensor expressions of the device.