Patent ID: 7593836

Claim:
An electromagnetic field simulator for repeatedly calculating a spatial distribution of an electromagnetic field at a point in time (n) by using a spatial distribution of the electromagnetic field at a previous point in time (n−1), the simulator comprising: a computer; a memory operatively connected to the computer; a computation conditions setting unit to set sampling resolutions of time and space in a simulation of the electromagnetic field; a coefficients setting unit to set coefficients for the electromagnetic field calculation in each position on a simulation space; a polarization calculation unit to calculate a spatial distribution of the electromagnetic field and a spatial distribution of a polarization current inside a substance at the point in time (n) by using a spatial distribution of the electromagnetic field and a spatial distribution of the polarization current inside the substance at the previous point in time (n−1) and the coefficients, which are set by the coefficients setting unit; and a display unit to display an analysis result based on the calculated spatial distribution of the electromagnetic field, wherein the coefficients setting unit switches from a first computational formula used to calculate the spatial distribution of the polarization current in the polarization calculation unit to a second computational formula based on the sampling resolution of the space, which is set in the computation conditions setting unit, and the polarization calculation unit calculates the spatial distribution of the polarization current at the point in time (n) by using the second computational formula, and at least one of the computations setting unit, the coefficients setting unit, the polarization calculation unit, and the display unit is implemented by the computer and the memory.