Visualization of electric field around dipole antenna

  • #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?

Answers and Replies

  • #2
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.
  • Like
Likes GhostLoveScore