EM programmer´s notebook

This article covers two contributions. One contribution is by Dr. Peter Petropoulos, who gives recommendations for the sampling density in finite-difference time-domain simulations. His observations point out that higher-order elements may be essential for large-scale implementations. He also provides a rigorous proof. The second contribution is by Dr. J. Appel-Hansen, who presents a non-trivial problem, but one amenable to a trivial solution. The problem involves two arbitrary but identical, properly placed sources, illuminating a flat plate of an arbitrary shape. Consequently, it can be used to possibly validate scattering and antenna codes.<>