Title:
Circuit Extraction via Time-Domain Vector Fitting
Author(s):
S. Grivet-Talocia, F. G. Canavero, I. S. Stievano, I. A. Maio
Source:
International Symposium on Electromagnetic Compatibility (EMC 2004)
Vol./Issue/Date:
Volume 3, 9-13 Aug.
Year:
2004
Page(s):
1005 - 1010
Keywords:
Abstract:
This paper introduces a new algorithm for the automatic
synthesis of SPICE-ready equivalent circuits of complex
multiport lumped interconnect structures. The method is named
Time-Domain Vector Fitting (TD-VF) due to its analogy to the
well-known Vector Fitting algorithm, which operates in frequency
domain. The TD-VF computes a rational approximation of the
transfer matrix for the structure under modeling using as raw
data its transient port responses to suitable excitations. These
include, e.g., the case of transient port scattering responses as
typically obtained by full-wave electromagnetic solvers based
on the Finite-Differences Time-Domain (FDTD) or Finite Integration
(FIT) methods. The TD-VF algorithm works entirely
in the time domain, without requiring any knowledge of the
frequency-domain responses. This allows direct processing of
possibly truncated transient responses, therefore allowing for
short full-wave simulations. This paper shows that the accuracy
level achiavable by TD-VF is excellent. Hence, passivity can be
enforced a posteriori using the spectral properties of associated
Hamiltonian matrices. Several examples of package, connectors,
and discontinuities are provided as illustration.
Document:
Reference Id:
108
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