Second , several feasible methods with which to incorporate the microwave devices into the fdtd simulation of microwave active circuits are discussed . direct implementation places the circuit element on the edge of a fdtd cell as a two - terminal element in the device region . another implementation is to place effective electric currents , or equivalently , current sources , voltage sources and effective magnetic current sources 接著研究了如何把微波器件加入微波電路中進(jìn)行fdtd模擬的幾種方法,其中一種方法是把微波器件作為一個(gè)二端口元件放置在一個(gè)網(wǎng)格的邊上直接進(jìn)行fdtd運(yùn)算,另外一種方法是在有微波器件的區(qū)域使用有效的電流來(lái)代替微波器件,或者等效的源,包括等效電流源,等效電壓源和等效磁流源。