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A generalized eigenvalue method for fdtd analyses
Author(s) -
Ko Wai Lee,
Aksun M. Irsadi,
Mittra Raj
Publication year - 1993
Publication title -
microwave and optical technology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 76
eISSN - 1098-2760
pISSN - 0895-2477
DOI - 10.1002/mop.4650060912
Subject(s) - finite difference time domain method , computation , eigenvalues and eigenvectors , exponential function , mathematics , microwave , time domain , code (set theory) , mathematical analysis , algorithm , computer science , physics , optics , telecommunications , set (abstract data type) , quantum mechanics , computer vision , programming language
In this article we apply the generalized eigenvalue method (GEM) to extract the complex exponentials from a truncated time record computed by the finite‐difference time‐domain (FDTD) code for analyzing microwave integrated circuits. To obtain accurate scattering parameters without further FDTD computations, the truncated FDTD time record is efficiently extended into the future by summing the complex exponentials with complex coefficients determined by the least‐squares method. Numerical GEM results with fewer poles are shown to be in good agreement with those obtained by the Prony method with a large number of poles. © 1993 John Wiley & Sons, Inc.