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Material characterization in partially filled waveguides using inverse scattering and multiple sample orientations

Sjöberg, Daniel LU orcid and Larsson, Christer LU (2015) In Radio Science 50(6). p.554-561
Abstract
Abstract in Undetermined
We present a method aimed at reducing uncertainties and instabilities when characterizing materials in waveguide setups. The method is based on measuring the S parameters for three different orientations of a rectangular sample block in a rectangular waveguide. The corresponding geometries are modeled in a commercial full-wave simulation program, taking any material parameters as input. The material parameters of the sample are found by minimizing the squared distance between measured and calculated S parameters. The information added by the different sample orientations is quantified using the Cramer-Rao lower bound. The flexibility of the method allows the determination of material parameters of an... (More)
Abstract in Undetermined
We present a method aimed at reducing uncertainties and instabilities when characterizing materials in waveguide setups. The method is based on measuring the S parameters for three different orientations of a rectangular sample block in a rectangular waveguide. The corresponding geometries are modeled in a commercial full-wave simulation program, taking any material parameters as input. The material parameters of the sample are found by minimizing the squared distance between measured and calculated S parameters. The information added by the different sample orientations is quantified using the Cramer-Rao lower bound. The flexibility of the method allows the determination of material parameters of an arbitrarily shaped sample that fits in the waveguide. (Less)
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author
and
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
material characterization, waveguide, inverse scattering
in
Radio Science
volume
50
issue
6
pages
554 - 561
publisher
American Geophysical Union (AGU)
external identifiers
  • wos:000358016900008
  • scopus:84947025011
ISSN
0048-6604
DOI
10.1002/2014RS005551
language
English
LU publication?
yes
id
a4430551-7c8e-4b06-9ff4-a084985b99fb (old id 7791331)
date added to LUP
2016-04-01 14:11:22
date last changed
2022-01-27 23:17:53
@article{a4430551-7c8e-4b06-9ff4-a084985b99fb,
  abstract     = {{Abstract in Undetermined<br/>We present a method aimed at reducing uncertainties and instabilities when characterizing materials in waveguide setups. The method is based on measuring the S parameters for three different orientations of a rectangular sample block in a rectangular waveguide. The corresponding geometries are modeled in a commercial full-wave simulation program, taking any material parameters as input. The material parameters of the sample are found by minimizing the squared distance between measured and calculated S parameters. The information added by the different sample orientations is quantified using the Cramer-Rao lower bound. The flexibility of the method allows the determination of material parameters of an arbitrarily shaped sample that fits in the waveguide.}},
  author       = {{Sjöberg, Daniel and Larsson, Christer}},
  issn         = {{0048-6604}},
  keywords     = {{material characterization; waveguide; inverse scattering}},
  language     = {{eng}},
  number       = {{6}},
  pages        = {{554--561}},
  publisher    = {{American Geophysical Union (AGU)}},
  series       = {{Radio Science}},
  title        = {{Material characterization in partially filled waveguides using inverse scattering and multiple sample orientations}},
  url          = {{http://dx.doi.org/10.1002/2014RS005551}},
  doi          = {{10.1002/2014RS005551}},
  volume       = {{50}},
  year         = {{2015}},
}