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

Persson, Kristin LU ; Gustafsson, Mats LU and Kristensson, Gerhard LU (2010) In Technical Report LUTEDX/(TEAT-7184)/1-45/(2010)
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. The results are also compared with earlier results where a scalar integral representation was employed. (Less)
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author
organization
publishing date
type
Book/Report
publication status
published
subject
in
Technical Report LUTEDX/(TEAT-7184)/1-45/(2010)
pages
45 pages
publisher
[Publisher information missing]
external identifiers
  • scopus:77951881093
project
Teorel: Radomes and frequency selective surfaces (FMV)
language
English
LU publication?
yes
id
b2dbd83a-f504-43a6-badc-3b2ed078b5b0 (old id 1530450)
date added to LUP
2010-01-22 10:02:10
date last changed
2017-03-05 04:31:33
@techreport{b2dbd83a-f504-43a6-badc-3b2ed078b5b0,
  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. The results are also compared with earlier results where a scalar integral representation was employed.},
  author       = {Persson, Kristin and Gustafsson, Mats and Kristensson, Gerhard},
  institution  = {[Publisher information missing]},
  language     = {eng},
  pages        = {45},
  series       = {Technical Report LUTEDX/(TEAT-7184)/1-45/(2010)},
  title        = {Reconstruction and visualization of equivalent currents on a radome using an integral representation formulation},
  year         = {2010},
}