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Unified Theory of Characteristic Modes : Part II - Tracking, Losses, and FEM Evaluation

Gustafsson, Mats LU orcid ; Jelinek, Lukas ; Schab, Kurt and Capek, Miloslav (2022) In IEEE Transactions on Antennas and Propagation 70(12). p.11814-11824
Abstract

This is the second component of a two-part paper dealing with a unification of characteristic mode decomposition. This second part addresses modal tracking, interpolation, the role of ohmic losses, and presents several numerical examples for surface-based method-of-moment formulations. A new tracking algorithm based on algebraic properties of the transition matrix is developed, achieving excellent precision and requiring a very low number of frequency samples as compared to procedures previously reported in the literature. The transition matrix is further utilized to show that characteristic mode decomposition of lossy objects fails to deliver orthogonal far fields and to demonstrate how characteristic modes can be evaluated using the... (More)

This is the second component of a two-part paper dealing with a unification of characteristic mode decomposition. This second part addresses modal tracking, interpolation, the role of ohmic losses, and presents several numerical examples for surface-based method-of-moment formulations. A new tracking algorithm based on algebraic properties of the transition matrix is developed, achieving excellent precision and requiring a very low number of frequency samples as compared to procedures previously reported in the literature. The transition matrix is further utilized to show that characteristic mode decomposition of lossy objects fails to deliver orthogonal far fields and to demonstrate how characteristic modes can be evaluated using the finite element method.

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author
; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Antenna theory, characteristic modes, computational electromagnetics, Correlation, Eigenvalues and eigenfunctions, eigenvalues and eigenfunctions, Finite element analysis, Impedance, Interpolation, Matrix decomposition, method of moments, Scattering, scattering, T-matrix method
in
IEEE Transactions on Antennas and Propagation
volume
70
issue
12
pages
1 pages
publisher
IEEE - Institute of Electrical and Electronics Engineers Inc.
external identifiers
  • scopus:85139442071
ISSN
0018-926X
DOI
10.1109/TAP.2022.3209264
language
English
LU publication?
yes
id
5fcdfb78-34dd-4d3f-9dd2-32ab3d7164f3
date added to LUP
2022-12-14 11:29:18
date last changed
2023-11-16 20:32:30
@article{5fcdfb78-34dd-4d3f-9dd2-32ab3d7164f3,
  abstract     = {{<p>This is the second component of a two-part paper dealing with a unification of characteristic mode decomposition. This second part addresses modal tracking, interpolation, the role of ohmic losses, and presents several numerical examples for surface-based method-of-moment formulations. A new tracking algorithm based on algebraic properties of the transition matrix is developed, achieving excellent precision and requiring a very low number of frequency samples as compared to procedures previously reported in the literature. The transition matrix is further utilized to show that characteristic mode decomposition of lossy objects fails to deliver orthogonal far fields and to demonstrate how characteristic modes can be evaluated using the finite element method.</p>}},
  author       = {{Gustafsson, Mats and Jelinek, Lukas and Schab, Kurt and Capek, Miloslav}},
  issn         = {{0018-926X}},
  keywords     = {{Antenna theory; characteristic modes; computational electromagnetics; Correlation; Eigenvalues and eigenfunctions; eigenvalues and eigenfunctions; Finite element analysis; Impedance; Interpolation; Matrix decomposition; method of moments; Scattering; scattering; T-matrix method}},
  language     = {{eng}},
  number       = {{12}},
  pages        = {{11814--11824}},
  publisher    = {{IEEE - Institute of Electrical and Electronics Engineers Inc.}},
  series       = {{IEEE Transactions on Antennas and Propagation}},
  title        = {{Unified Theory of Characteristic Modes : Part II - Tracking, Losses, and FEM Evaluation}},
  url          = {{http://dx.doi.org/10.1109/TAP.2022.3209264}},
  doi          = {{10.1109/TAP.2022.3209264}},
  volume       = {{70}},
  year         = {{2022}},
}