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Inductance of a triaxial cable

  1. Dec 31, 2003 #1
    Hello, I'm a new member of the forum.

    Are there any good sources of information available that contain (and explain) inductance calculations for various symmetrical (but unconventional) geometries? I'm interested in a triaxial conductor that is similar to a coax in geometric make-up, but there are three concentric cylindrical conductors instead of two. I know that triaxial cables exist (mostly for small signal high frequency apps), but I cannot find any theory about them in books or journals. If someone in this forum can help me or point me in the right direction, I would deeply appreciate it.


  2. jcsd
  3. Jan 2, 2004 #2
    For a start, the inductance on the innermost conductor should not change in triax, so the reference books will help you there - just treat it like coax.

    Typically, the outermost conductor is grounded to act as a shield. The presence of the ground surrounding the second conductor will affect its inductance. I've never seen such a calculation and I never seemed to need know this when I've used triax. What mattered to me was the impedance between the innermost & second conductor.
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