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I Visualization of electric field around dipole antenna

  1. Nov 22, 2016 #1
    I came across these videos that show how electric field looks around the dipole antenna at three different distances

    Far field

    Near field


    Something between far and near field


    That got me thinking - there is a point when the field is reversing and the electric field closes into a loop and propagates away from the antenna.
    If this animation is correct it would seem that the E field closes into a loop because the field close to the antenna is changing too rapidly and the rest of the field can't keep up and eventually thick yellow lines come very close and connect. And that leaves the rest of the field not connected to antenna anymore.

    Am I making any sense here?
     
  2. jcsd
  3. Nov 25, 2016 #2

    sophiecentaur

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    Science Advisor
    Gold Member

    Yes. That makes sense. The higher the frequency, the sooner you get the wave 'breaking away', I.e. it's wavelength related.
     
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