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Theory and Computation of Substructure Characteristic Modes

Gustafsson, Mats LU orcid ; Jelinek, Lukas ; Capek, Miloslav LU ; Lundgren, Johan LU and Schab, Kurt LU (2025) In IEEE Transactions on Antennas and Propagation 73(3). p.1321-1333
Abstract

The problem of substructure characteristic modes is developed using a scattering matrix-based formulation, generalizing subregion characteristic mode decomposition to arbitrary computational tools. It is shown that the modes of the scattering formulation are identical to the modes of the classical formulation based on the background Green’s function for lossless systems under conditions where both formulations can be applied. The scattering formulation, however, opens a variety of new subregion scenarios unavailable within previous formulations, including cases with lumped or wave ports or subregions in circuits. Thanks to its scattering nature, the formulation is solver-agnostic with the possibility to utilize an arbitrary full-wave... (More)

The problem of substructure characteristic modes is developed using a scattering matrix-based formulation, generalizing subregion characteristic mode decomposition to arbitrary computational tools. It is shown that the modes of the scattering formulation are identical to the modes of the classical formulation based on the background Green’s function for lossless systems under conditions where both formulations can be applied. The scattering formulation, however, opens a variety of new subregion scenarios unavailable within previous formulations, including cases with lumped or wave ports or subregions in circuits. Thanks to its scattering nature, the formulation is solver-agnostic with the possibility to utilize an arbitrary full-wave method.

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Please use this url to cite or link to this publication:
author
; ; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Antenna theory, characteristic modes, computational electromagnetics (CEM), eigenvalues and eigenfunctions, scattering
in
IEEE Transactions on Antennas and Propagation
volume
73
issue
3
pages
13 pages
publisher
IEEE - Institute of Electrical and Electronics Engineers Inc.
external identifiers
  • scopus:86000433147
ISSN
0018-926X
DOI
10.1109/TAP.2025.3528478
language
English
LU publication?
yes
additional info
Publisher Copyright: © 2025 IEEE. All rights reserved.
id
897dafe8-a529-42e1-a395-22d01bf598f9
date added to LUP
2025-06-24 15:27:52
date last changed
2025-06-25 14:21:55
@article{897dafe8-a529-42e1-a395-22d01bf598f9,
  abstract     = {{<p>The problem of substructure characteristic modes is developed using a scattering matrix-based formulation, generalizing subregion characteristic mode decomposition to arbitrary computational tools. It is shown that the modes of the scattering formulation are identical to the modes of the classical formulation based on the background Green’s function for lossless systems under conditions where both formulations can be applied. The scattering formulation, however, opens a variety of new subregion scenarios unavailable within previous formulations, including cases with lumped or wave ports or subregions in circuits. Thanks to its scattering nature, the formulation is solver-agnostic with the possibility to utilize an arbitrary full-wave method.</p>}},
  author       = {{Gustafsson, Mats and Jelinek, Lukas and Capek, Miloslav and Lundgren, Johan and Schab, Kurt}},
  issn         = {{0018-926X}},
  keywords     = {{Antenna theory; characteristic modes; computational electromagnetics (CEM); eigenvalues and eigenfunctions; scattering}},
  language     = {{eng}},
  number       = {{3}},
  pages        = {{1321--1333}},
  publisher    = {{IEEE - Institute of Electrical and Electronics Engineers Inc.}},
  series       = {{IEEE Transactions on Antennas and Propagation}},
  title        = {{Theory and Computation of Substructure Characteristic Modes}},
  url          = {{http://dx.doi.org/10.1109/TAP.2025.3528478}},
  doi          = {{10.1109/TAP.2025.3528478}},
  volume       = {{73}},
  year         = {{2025}},
}