Reconstruction of Complex Permittivity of a Longitudinally Inhomogeneous Material Loaded in a Rectangular Waveguide

In this study, an integral equation technique is presented in order to reconstruct the complex permittivity variation of a material loaded in a rectangular cross section waveguide. The problem is first reduced to the solution of a two-coupled integral equations in terms of S-parameters of the system...

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Bibliographic Details
Published in:IEEE microwave and wireless components letters 2008-03, Vol.18 (3), p.158-160
Main Author: Akleman, F.
Format: Article
Language:English
Subjects:
Applied sciences
Biological materials
Biomedical materials
Biomedical measurements
Circuit properties
Complex permittivity
Contrast source inversion (CSI)
Cross sections
Dielectric materials
Dielectric measurements
Electric, optical and optoelectronic circuits
Electronics
Exact sciences and technology
Integral equations
Inverse problems
Inversions
Loaded waveguides
Mathematical models
Microwave circuits, microwave integrated circuits, microwave transmission lines, submillimeter wave circuits
Microwaves
Permittivity measurement
permittivity reconstruction
Reconstruction
Rectangular waveguides
waveguide
Waveguides
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Summary:In this study, an integral equation technique is presented in order to reconstruct the complex permittivity variation of a material loaded in a rectangular cross section waveguide. The problem is first reduced to the solution of a two-coupled integral equations in terms of S-parameters of the system, which contains the Green's function of the empty waveguide. The resulting inverse scattering problem for the unknown complex permittivity of the loading is solved by contrast source inversion (CSI) technique. The validity and reliability of the proposed method has been demonstrated with numerical applications.
ISSN:1531-1309
2771-957X
1558-1764
2771-9588
DOI:10.1109/LMWC.2008.916775