圆柱形超材料电磁隐身旋转聚焦器的设计与仿真

研究一种新型可以旋转电磁波方向的超材料电磁隐身装置-圆柱形旋转聚焦器.基于坐标变换理论,设计出圆柱形旋转聚焦器对应的空间变换方式,并推导出该装置在不同区域的电磁参数张量.有限元软件的仿真结果验证了该装置预期的电磁功能.与先前的圆柱形超材料隐身聚焦器相比,该隐身装置在特定区域不仅能够实现电磁波能量的聚焦,还能够变换电磁波的初始传播方向.此外,在设计方法上对于旋转聚焦器的形状拓展也进行了讨论. 

Design and Simulation of Cylindrical Metamaterial Electromagnetic Invisible Rotated Concentrator

A novel functional metamaterial electromagnetic invisible device called "cylindrical rotated concentrator", being able to rotate direction of electromagnetic wave, was proposed. Based on coordinate transformation theory, the corresponding space transformation of cylindrical rotated concentrator was designed. And the permittivity and permeability tensors of the device in different regions were deduced. Simulation results based on finite element method validate the expected electromagnetic functions of the device. Compared with the previous cylindrical metamaterial invisible concentrator, this rotated concentrator can not only concentrate the electromagnetic wave energy in particular region, but also transform the original direction of the wave in the same region. Besides, the design methods to develop the shapes of rotated concentrator were also analyzed.