The microwave design of highly complex systems can be addressed by segmenta
tion techniques. To this purpose, a subsystem macromodel, such as the impul
se response matrix, needs to be computed in an accurate and efficient way,
In this paper, we present a combined procedure, based on finite-difference
time-domain and a moment-expansion deconvolution by which the impulse respo
nse matrix is obtained via time-domain processing only. The algorithm has b
een tested on microwave planar devices with satisfactory accuracy.