The earthing method of the metal sheath varies somewhat in different cable lengths, which affects greatly line parameters, especially zero sequence impedance.
对于不同长度的电缆线路其金属护套的接地方式亦不尽相同，从而对电缆线路参数，尤其是对零序阻抗将产生较大的影响。
The distributing characteristics of the electromagnetism field in the RF coaxial cable and the expression of characteristic impedance are introduced.
介绍了射频同轴电缆线中电磁场分布特点和其特性阻抗表达式。
It's the continuity of cable impedance that matters.
最主要的是同轴线阻抗的连续性。
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