HFSS边界条件Finite Conductivity和Impedance有什么不同

Finite Conductivity –A Finite Conductivity boundary enables you to define the surface of an object as a lossy (imperfect) conductor. It is an imperfect E boundary condition, and is analogous to the lossy metal material definition. It is only valid for 
good conductors. 
既然说模拟lossy conductor ,那还为什么说only valid for good conductors？？？？ 
还有两种边界条件：Finite Conductivity和Impedance有什么不同？

网友回复:

a lossy (imperfect) conductor的话，boundary condition就不能是iperfect E，所以你不能使用默认的边界条件，必须重新定义。有损耗就应该使用Finite Conductivity。

网友回复:

谢谢！1楼

申明：网友回复良莠不齐，仅供参考。如需专业解答，请学习易迪拓培训专家讲授的HFSS视频培训教程。