English: Electric Dipole Radiation, Dipole parallel to the z-axis, electric field and poynting-vector in the x-z-plane. Colours indicate the strength of the electric field vector ${\displaystyle E=\sqrt{E_x^2+E_z^2}}$, ${\displaystyle (E_y=0)}$, red colours indicate ${\displaystyle E_z>0}$, blue colours ${\displaystyle E_z<0}$. The black arrows show ${\displaystyle (S_x,S_z)}$. As E and S become very large in the center of the dipole they are limited to a certain value.