由本征平面波反射性质定义的电磁边界条件
Electromagnetic Boundary Conditions Defined by Reflection Properties of Eigen Plane Waves
摘要：
已知入射到广义软硬/DB（GSHDB）边界的两个本征平面波从PEC或PMC边界反射，即，对于任何入射角，具有反射系数$-1$或$+1$。本文讨论了一类更一般的边界，要求对应于两个本征平面波的反射系数$R_+$和$R_-$具有相反的值，$R_\pm=\pm R$和$R$与入射角无关。结果表明，存在两种可能性，$R=1$是GSHDB边界类，而$R=j$是另一类，扩展了理想电磁导体（PEMC）边界类.本文研究了后一类边界的匹配波和平面波反射。
英文摘要：
It is known that the two eigen plane waves incident to the generalized soft-and-hard/DB (GSHDB) boundary are reflected as from the PEC or PMC boundary, i.e., with reflection coefficients $-1$ or $+1$, for any angle of incidence. The present paper discusses a more general class of boundaries by requiring that the reflection coefficients $R_+$ and $R_-$, corresponding to the two eigen plane waves, have opposite values, $R_\pm=\pm R$ with $R$ independent of the angle of incidence. It turns out that, there are two possibilities, $R=1$ for the class of GSHDB boundaries, and $R=j$ for another class, extending that of the perfect electromagnetic conductor (PEMC) boundaries. Matched waves at, and plane-waves reflected from, boundaries of the latter class are studied in the paper.
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