How does an antenna radiates if its current is zero at ends?
I think electrons leaving and surging across dipoles goes a bit too far. The actual electron displacement in an antenna is minuscule when Quintillions of electrons vibrate at the RF frequency. The electromagnetic field travels at the speed of light but electrons travel at the drift velocity in a conductor and have very little momentum/kinetic energy usually.As the ends of the dipoles change polarity the electrons leave one dipole and surge into the other. Back and forth, back and forth.
Nothing quantum or very mysterious about classical electromagnetics and drift velocities. I liked your explanation except for the scope of travel for electron movements.Honestly, there is still some disagreement with how RF energy moves from antenna to near field regions.
Understanding the quantum physics of the action is not necessary to becoming an excellent tech or engineer.
It's a convenient, logical but nonfactual (current or charge-flow as the energy-flow carrier) inference that works well in circuit theory, hydraulic/xyz analogies, etc ...To be truthful it was only a few years ago I myself finally discovered the truth.
I had presumed all my life that electrons travelled at lightspeed in copper wire. Then to find out an individual electron only moves mere inches per second.
I was amazed.