signals

Discussion in 'Wireless & RF Design' started by hayden, Jul 3, 2009.

  1. hayden

    Thread Starter New Member

    Jul 2, 2009
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    can anyone tell me why signals are expressed as complex numbers even when "real signals"
     
  2. kammenos

    Active Member

    Aug 3, 2008
    127
    0
    ???????????????????
     
  3. hgmjr

    Moderator

    Jan 28, 2005
    9,030
    214
    Can you provide an example of a expression for a signal that prompted your question?

    hgmjr
     
  4. Papabravo

    Expert

    Feb 24, 2006
    10,137
    1,786
    It is because the algebra of complex numbers accurately models the magnitude and phase behavior of real signals. We could call them AC signal vectors if that would make you feel better.
     
  5. ELECTRONERD

    Senior Member

    May 26, 2009
    1,146
    16
    ElectroMagnetic (EM) waves consist of an electric and magnetic field. They are perpendicular to eachother. So if someone told you that the magnetic field is horizontal you could imply that the electrical field is vertical, and therefore it is a vertical antenna.
     
  6. mik3

    Senior Member

    Feb 4, 2008
    4,846
    63
    It is easier to manipulate complex numbers than vectors, thus they don't express signals in vectors (you can if you want).
     
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