Home Forums FDTD why my reflection is in negative value

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    • #68893
      Jawaduddin Abro

      I have designed the structure, which i have attached below and it contains the file of reflection line which has the power is in the negative. I am not sure why it is in negative ? Pls guide me

      Thank you

    • #68930
      Scott Newman

      The sign on the power is an indication of the direct the power is flowing through the observation area. Area is taken based on the normal of the observation area. For example for a Z-directed observation area (covers XY area) the normal is the z-axis. Power moving along the +z direction will be positive while negative power indicates the power flow direction to be the -z direction.


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