3D Dipole Radiation Pattern vs Current Distribution, effect of increase the electrical length

In this animation we show how changes the Current Distribution of a z axis oriented dipole and his radiation pattern due to the increase of the ratio L/lambda, electrical length, (with L = 2 H)

Normally when we increment the ratio L/lambda the directivity increases also, but it arrives a moment in which the current distribution changes radically and causes that new lobes appear causing the reduction of the previous main lobe.
Now the direction of maximum radiation has changed

Note that increase the ratio L/lambda by 15 is possible in two ways:
1- Given a fixed frequency, increase L by 15
2- Given a fixed length L, increase the frequency by 15

Видео 3D Dipole Radiation Pattern vs Current Distribution, effect of increase the electrical length канала Diego Gaston