Powerline communication

Discussion in 'Wireless & RF Design' started by captainshahid, Feb 29, 2012.

  1. captainshahid

    Thread Starter New Member

    Feb 29, 2012
    i am working with powerline communication and facing problem to design coupler circuit,,,,,,,,,if anyone know pls help.

    i am confused over that
    1. my frequency range is 400khz that what should be the value of coupler capacitor
    2. what is the turn ratio of transformer
    3.what should be the power level to transmit signal over kilometers
    4. is there no any solidstate technology like photocoupler to directly coupled with ac power line . ??????????
  2. crutschow


    Mar 14, 2008
    1. The power line high frequency characteristic impedance is probably about 100 ohms so design for that.
    2. The turns ratio is determined by how much signal voltage you want on the power line.
    3. Good question. Where do you plan to go so far? You do know that such a high frequency signal will not pass through a power transformer(?).
    4. A photocoupler would not likely work well. A high frequency transformer for coupling is probably best.