And the general procedures of these methods are summarized . finally , some practical problems are analyzed using fdtd , which include passive linear resistor element and nonlinear diode element in the microwave circuits and an integrated antenna embedded with an active gunn diode element and a dielectric cavity resonator 最后,本文通過編程模擬了微波電路中的無源線性器件電阻和非線性器件二極管,含有有源器件gunn二極管的有源集成微帶天線以及介質腔諧振器等具體實例,來驗證各種方法的可行性和有效性,計算結果與實驗結果吻合。