Complex Permittivity Determination of Dielectric Materials by Waveguide Measurements: A Robust Approach Based on Integral Equations

A robust approach for the determination of frequency dependent complex dielectric permittivity of materials by waveguide measurements is presented. The method is based on a nonlinear system of integral equations related to loaded rectangular waveguide which is solved by the classical iterative Newto...

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Bibliographic Details
Published in:IEEE microwave and wireless components letters 2011-11, Vol.21 (11), p.631-633
Main Authors: Kilic, E., Yapar, A., Akleman, F.
Format: Article
Language:English
Subjects:
Applied sciences
Circuit properties
Complex dielectric permittivity
Dielectric constant
dielectric loaded waveguide
Dielectrics
Dynamical systems
Electric, optical and optoelectronic circuits
Electronics
Exact sciences and technology
Image reconstruction
Integral equations
inverse problem
Mathematical model
Microwave circuits, microwave integrated circuits, microwave transmission lines, submillimeter wave circuits
Microwaves
Permittivity
Permittivity measurement
Rectangular waveguides
Three dimensional
Waveguides
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Description
Summary:A robust approach for the determination of frequency dependent complex dielectric permittivity of materials by waveguide measurements is presented. The method is based on a nonlinear system of integral equations related to loaded rectangular waveguide which is solved by the classical iterative Newton method. It is both theoretically and experimentally shown that the method is effective and reliable. The method has no limitations on the geometry of the samples loaded in waveguide, since a 3-D formulation involving the dyadic Green's function is carried out. It is further shown that the method is not so sensitive to the errors or uncertainties on the dimensions of the samples.
ISSN:1531-1309
2771-957X
1558-1764
2771-9588
DOI:10.1109/LMWC.2011.2167138