In FDTD-Diakoptics

a complex microwve circuit is partitioned into several simple sub-circuits. Each subcircuit is analyzed by finite-difference time-domin （FDTD） method independently

and a parallcl algorithm is applied to cascade all the sub-circuits together. The metdod in this paper is Particularly suitable to the analysis and design of the geometrically complex structures and the clectrically large circuits. With the sarne computational precision

the efficiency is improvedapproximately five times by using the proha apprcach compared to the method using are to analyze the circuit entirely.Therefore the method prasented in this paper is very useful.