单轴各向异性异向介质平板波导中的导模特性

 推导了介电常数张量和磁导率张量中各分量带有不同符号的单轴各向异性异向介质平板波导的导行条件。根据分量符号的正负组合，分情况讨论了导行TE波的偶模特性，画出了平板波导中为实横波数时的布里渊图。结果表明，在特定条件下此平板波导中有无穷多导模，这与传统介质波导及各向同性异向介质平板中只有有限数量模式存在有很大不同。此外，还发现当分量参数满足一定条件时，出现了多个虚横波数的传输模式解，并且该模式存在高频截止。

Characteristic of guided modes in a slab waveguide of uniaxially anisotropic metamaterial

The guidance conditions of a slab waveguide of uniaxially anisotropic metamaterial with partially negative components in permittivity and permeability tensors are derived.In terms of the combination of component signs,the even mode properties for guided TE waves are discussed in different cases.The Brillouin diagrams with real transverse wave numbers inside a slab waveguide are drawn.The results show that under some specific conditions there are infinite guided modes,which is different from the case in the traditional dielectric waveguide and isotropic metamaterial slab where only finite number of guided modes exists.It is also found that there are multiple solutions of the propagating mode with imaginary transverse wave number for certain component parameters,and the mode has the high-frequency cutoff.