A Grid of Uniformly Spaced Rods Parallel to a Plate or between and Parallel to Two Parallel Plates

From a study on gratings for certain types of EMP simulators, the charge distribution is calculated on a grid of uniformly spaced rods in two different cases, namely, i) a grid of rods above a ground plane and ii) a grid of rods between two parallel plates. In each case numerical calculations are carried out for both the maximum value of the normal component of the electric field at the surface of each rod and the effective electric height of the grid, i.e., the distance between two parallel plates having the same capacitance per unit cell as the considered grid. Different expressions of the potential due to a two-dimensional lattice of line charges are also derived.