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Far-field orthogonality of volume-based characteristic modes for real materials

Miers, Zachary T. LU and Lau, Buon Kiong LU (2017) 21st International Symposium on Antennas and Propagation, ISAP 2016 In ISAP 2016 - International Symposium on Antennas and Propagation p.242-243
Abstract

Two different solutions for the characteristic modes (CMs) of lossy structures were previously developed using induced volume currents. The first solution diagonalizes the scattering and perturbation matrices, guaranteeing far-field orthogonality at the cost of imaginary eigenvalues and eigencurrents. The second solution does not perfectly diagonalize these matrices, but maintains real-valued eigenvalues and eigencurrents. When these matrices are non-perfectly diagonalized the characteristic far-fields are no longer fully orthogonal to one another. However, the second formulation has not yet been investigated, and as such the effect of non-perfect diagonalization on the orthogonality of the far-field patterns is still unknown. For this... (More)

Two different solutions for the characteristic modes (CMs) of lossy structures were previously developed using induced volume currents. The first solution diagonalizes the scattering and perturbation matrices, guaranteeing far-field orthogonality at the cost of imaginary eigenvalues and eigencurrents. The second solution does not perfectly diagonalize these matrices, but maintains real-valued eigenvalues and eigencurrents. When these matrices are non-perfectly diagonalized the characteristic far-fields are no longer fully orthogonal to one another. However, the second formulation has not yet been investigated, and as such the effect of non-perfect diagonalization on the orthogonality of the far-field patterns is still unknown. For this reason, it is not clear if volume-based characteristic modes can be used for CM analysis (CMA) of lossy dielectric structures. This article evaluates the effect of different losses on the modal orthogonality of two dielectric resonant structures, and determines the practicality of using volume-based CMA.

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author
organization
publishing date
type
Chapter in Book/Report/Conference proceeding
publication status
published
subject
keywords
Antenna Design, Antennas, Characteristic Modes, Far-field Orthogonality, VIE
in
ISAP 2016 - International Symposium on Antennas and Propagation
pages
2 pages
publisher
Institute of Electrical and Electronics Engineers Inc.
conference name
21st International Symposium on Antennas and Propagation, ISAP 2016
external identifiers
  • scopus:85013170973
ISBN
9784885523137
language
English
LU publication?
yes
id
188ce971-4eb1-4544-ae4b-74acae0378ea
date added to LUP
2017-03-01 12:25:07
date last changed
2018-01-07 11:53:22
@inproceedings{188ce971-4eb1-4544-ae4b-74acae0378ea,
  abstract     = {<p>Two different solutions for the characteristic modes (CMs) of lossy structures were previously developed using induced volume currents. The first solution diagonalizes the scattering and perturbation matrices, guaranteeing far-field orthogonality at the cost of imaginary eigenvalues and eigencurrents. The second solution does not perfectly diagonalize these matrices, but maintains real-valued eigenvalues and eigencurrents. When these matrices are non-perfectly diagonalized the characteristic far-fields are no longer fully orthogonal to one another. However, the second formulation has not yet been investigated, and as such the effect of non-perfect diagonalization on the orthogonality of the far-field patterns is still unknown. For this reason, it is not clear if volume-based characteristic modes can be used for CM analysis (CMA) of lossy dielectric structures. This article evaluates the effect of different losses on the modal orthogonality of two dielectric resonant structures, and determines the practicality of using volume-based CMA.</p>},
  author       = {Miers, Zachary T. and Lau, Buon Kiong},
  booktitle    = {ISAP 2016 - International Symposium on Antennas and Propagation},
  isbn         = {9784885523137},
  keyword      = {Antenna Design,Antennas,Characteristic Modes,Far-field Orthogonality,VIE},
  language     = {eng},
  month        = {01},
  pages        = {242--243},
  publisher    = {Institute of Electrical and Electronics Engineers Inc.},
  title        = {Far-field orthogonality of volume-based characteristic modes for real materials},
  year         = {2017},
}