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Is there a program which can find the impedance of different geometries?

  1. Jul 24, 2008 #1
    I'm basically looking for something like Sonnet which performs well at low frequencies.

    I'm trying to investigate the impedance of different shaped traces at frequencies of around 1 - 20 kHz. At such low frequencies, Sonnet's response data is usually garbage.

    The trace under investigation is placed on a substrate, but the ground is not included on it. It is more closely related to a simple discrete resistor.

    Thanks
     
  2. jcsd
  3. Jul 24, 2008 #2

    berkeman

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    Staff: Mentor

    At such low frequencies, you are dealing with lumped parameters, not distributed. The impedance is determined by the lumped capacitance and inductance, as well as any leakage. Are you just wanting to calculate the capacitance and inductance of the traces?
     
  4. Jul 24, 2008 #3
    ...and resistance, yes. In sum, a Z parameter would be nice. Perhaps I should have been a bit more careful...its not really a trace between two other components on a PCB or anything. Think of it as a discrete impedance. It is of a more complex shape, however, so doing calculations by hand would be difficult.
     
  5. Jul 24, 2008 #4

    berkeman

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    Staff: Mentor

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