Figure 2
From: The time-domain Cartesian multipole expansion of electromagnetic fields
Comparison of the proposed method to a finite-difference time-domain (FDTD) numerical simulation. (a) The current density across the \(x_1x_2\)-plane for the intricate current distribution. The curvy part of the “P” is approximated by over 300 square current pixels. (b) The first component of the electric field radiated by the intricate current density at the points \(\textbf{x}=(0,0,\lambda )\) and \(\textbf{x}=(0,0,3/2\lambda )\). We compare an 8th-order multipole expansion with an FDTD numerical simulation.
