波导

The cut-off characteristics,bandwidth characteristis,and characteristic impedance of dominant mode of this pillowy waveguide are analyzed.

枕形波导的截止特性、带宽特性及主模的阻抗特性。

An optical fiber is a dielectric (nonconductor of electricity) waveguide made of glass or plastic.

光纤是一种介质（绝缘体电）波导的璃或塑料。