S-Domain Methods for Simultaneous

JasonYoo

S-Domain Methods for Simultaneous [复制链接]

Abstract— An efficient procedure is developed for simultaneously
characterizing the time-domain and frequency-domain
behavior of electromagnetic devices. The procedure works in
the complex-frequency plane—called the s-domain—and provides
an analytical expression for the behavior of the device at
any frequency and for any transient excitation. This analytical
expression is obtained by first evaluating a reduced-order model
of the poles and zeros of the device. These poles and zeros are
then used to characterize the device in terms of rational polynomials
in the s-domain. Two different methods for evaluating
reduced-order models are presented. One is called asymptotic
waveform evaluation (AWE) and is combined with the finiteelement
method; the other is called adaptive Lanzcos–Pad′e sweep
(ALPS) and is combined with the boundary-element method. The
resulting reduced-order models provide the frequency-domain
behavior of the device over a broad bandwidth. Using the Laplace
transform, these reduced-order models also provide the timedomain
behavior. Several numerical examples have been run
using commercial electronic design automation (EDA) software to
demonstrate that this solution procedure is a highly efficient and
accurate way to characterize the electromagnetic performance of
real-life devices.
Index Terms—Electromagnetic analysis, electromagnetic transient
analysis, finite-element methods, Maxwell’s equations,
reduced-order systems.