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Reconstruction and visualization of equivalent currents on a radome using an integral representation formulation

Persson, Kristin LU ; Gustafsson, Mats LU orcid and Kristensson, Gerhard LU (2010) In Progress In Electromagnetics Research B 20. p.65-90
Abstract
In this paper an inverse source problem is investigated. The measurement set-up is a reflector antenna covered by a radome. Equivalent currents are reconstructed on a surface shaped as the radome in order to diagnose the radome's interaction with the radiated field. To tackle this inverse source problem an analysis of a full-wave integral representation, with the equivalent currents as unknowns, is used. The extinction theorem and its associated integral equation ensure that the reconstructed currents represent sources within the radome. The axially symmetric experimental set-up reduces the computational complexity of the problem. The resulting linear system is inverted by using a singular value decomposition. We visualize how the presence... (More)
In this paper an inverse source problem is investigated. The measurement set-up is a reflector antenna covered by a radome. Equivalent currents are reconstructed on a surface shaped as the radome in order to diagnose the radome's interaction with the radiated field. To tackle this inverse source problem an analysis of a full-wave integral representation, with the equivalent currents as unknowns, is used. The extinction theorem and its associated integral equation ensure that the reconstructed currents represent sources within the radome. The axially symmetric experimental set-up reduces the computational complexity of the problem. The resulting linear system is inverted by using a singular value decomposition. We visualize how the presence of the radome alters the components of the equivalent currents. The method enables us to determine the phase shift of the field due to the transmission of the radome, i.e., the IPD (insertion phase delay). Also, disturbances due to defects, not observable in the measured near field, are localized in the equivalent currents. (Less)
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author
; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
inverse source problem, integral representation, radome diagnosis, near-field transformation, extinction theorem
in
Progress In Electromagnetics Research B
volume
20
pages
65 - 90
publisher
Electromagnetics Academy
external identifiers
  • scopus:77951881093
ISSN
1937-6472
DOI
10.2528/PIERB10012109
project
Teorel: Radomes and frequency selective surfaces (FMV)
language
English
LU publication?
yes
id
82881e26-f544-45f4-8811-feec2e342482 (old id 1578517)
date added to LUP
2016-04-04 10:00:46
date last changed
2022-02-13 19:08:15
@article{82881e26-f544-45f4-8811-feec2e342482,
  abstract     = {{In this paper an inverse source problem is investigated. The measurement set-up is a reflector antenna covered by a radome. Equivalent currents are reconstructed on a surface shaped as the radome in order to diagnose the radome's interaction with the radiated field. To tackle this inverse source problem an analysis of a full-wave integral representation, with the equivalent currents as unknowns, is used. The extinction theorem and its associated integral equation ensure that the reconstructed currents represent sources within the radome. The axially symmetric experimental set-up reduces the computational complexity of the problem. The resulting linear system is inverted by using a singular value decomposition. We visualize how the presence of the radome alters the components of the equivalent currents. The method enables us to determine the phase shift of the field due to the transmission of the radome, i.e., the IPD (insertion phase delay). Also, disturbances due to defects, not observable in the measured near field, are localized in the equivalent currents.}},
  author       = {{Persson, Kristin and Gustafsson, Mats and Kristensson, Gerhard}},
  issn         = {{1937-6472}},
  keywords     = {{inverse source problem; integral representation; radome diagnosis; near-field transformation; extinction theorem}},
  language     = {{eng}},
  pages        = {{65--90}},
  publisher    = {{Electromagnetics Academy}},
  series       = {{Progress In Electromagnetics Research B}},
  title        = {{Reconstruction and visualization of equivalent currents on a radome using an integral representation formulation}},
  url          = {{http://dx.doi.org/10.2528/PIERB10012109}},
  doi          = {{10.2528/PIERB10012109}},
  volume       = {{20}},
  year         = {{2010}},
}