Electromagnetic field simulation apparatus and computer readable storage medium storing electromagnetic field simulation program

An electromagnetic field simulation apparatus comprising:

• a processor;
• and
• a memory that stores a plurality of instructions, which are executed by the processor and cause the processor to:
• receive data defining, in virtual space, a shape of a conductor and a shape of an insulator included in a conductive layer and a dielectric layer of a printed circuit board
• set a plurality of cells in the virtual space by arranging first nodes of the cells on a boundary between the conductive layer and the dielectric layer in a thickness direction of the printed circuit board, arranging the first nodes of the cells at regular intervals in a domain selected in a plane parallel to the printed circuit board, and arranging second nodes of the cells outside the domain in the plane and outside the printed circuit in the thickness direction so that spacing of the second nodes geometrically increases in the plane and in the thickness direction toward absorbing boundaries for determination of an electromagnetic field strength,
• give, to each of the cells, an electric constant of a medium occupying an area of each of the cells, and
• determine a change over time in the electromagnetic field strength in each of the cells.

An electromagnetic field simulation method executable by a computer, the method comprising:

• receiving, at the computer, data defining, in virtual space, a shape of a conductor and a shape of an insulator included in a conductive layer and a dielectric layer of a printed circuit board;
• setting cells in the virtual space by arranging first nodes of the cells on a boundary between the conductive layer and the dielectric layer in a thickness direction of the printed circuit board, arranging the first nodes of the cells at regular intervals in a domain selected in a plane parallel to the printed circuit board, and arranging second nodes of the cells outside the domain in the plane and outside the printed circuit in the thickness direction so that spacing of the second nodes geometrically increases in the plane and in the thickness direction toward absorbing boundaries for determination of an electromagnetic field strength;
• giving, to each of the cells, an electric constant of a medium occupying an area of the each cell;
• and
• determining a change over time in the electromagnetic field strength in each of the cells.