Figure 1
From: The time-domain Cartesian multipole expansion of electromagnetic fields
Comparison of the semi-analytical result with the literature8. (a) Distribution of the current density approximating a disc across the \(x_1x_2\)-plane. The disc is formed of 5744 square current pixels. (b) The voltage \(x_3 E_1\) corresponding to the component of the electric field radiated by a disc at the points \(\textbf{x}=(0,0,27\lambda )\), \(\textbf{x}=(0,0,81\lambda )\) and \(\textbf{x}=(0,0,162\lambda )\). We compare the 24th-order Cartesian multipole expansion of the approximate disc with the spherical multipole expansion of the exact disc8.
