N. Morita et al., Development of an analysis method and its simulation tool for microstrip-type microwave integrated circuit elements, IEICE TR EL, E84C(7), 2001, pp. 898-904
A simulation tool for analyzing circuit characteristics of microstrip-type
MIC (Microwave Integrated Circuit) passive elements is presented. The major
part of this tool is the electromagnetic wave analysis based on the FD-TD
(Finite-Difference Time-Domain) method combined with the mode expansion the
ory. Although the element structures which can br treated in this tool are
limited to only less than ten fundamental structures in tile present stage,
its extension to the more versatile tool applicable to other various eleme
nt types is rather straight forward and simple in principle. When using thi
s tool, we first choose the element configuration to be calculated and give
, oil a panel, necessary parameter values related to calculation range and
mesh division scheme. Given these values, the first step calculation starts
to obtain the characteristic impedance, cross sectional field distribution
of the propagating mode, etc. of the basic microstrip line. Field distribu
tions around the element configuration are calculated next with the mode fi
eld oscillation being given. Through this process the field distributions o
n a closed rectangular parallelepiped surface enclosing the element configu
ration are stored in files, from which S parameter and radiated fields are
calculated by invoking the reaction integral with propagation modes and rad
iation modes, respectively. The results obtained in these three steps can b
e expressed, at our discretion, as line drawings or two-dimensional density
plots.