To provide a two-dimensional electromagnetic-field simulation method, in which a change in terms of time in a TM-mode electromagnetic field is calculated with secondary accuracy, when two mediums of different permittivities come into contact while one straight line tilted at 45° with reference to Yee lattice axis is used as a boundary. 誘電率が異なる2つの媒質が、Yee格子軸に対して45度傾いている1つの直線を境界として接している場合のTMモード電磁界の時間変化を2次精度で計算する二次元電磁界シミュレーション方法を提供する事。 - 特許庁