Complex permittivity determination of dielectric materials by waveguide measurements: A robust approach based on integral equations

Emre Kiliç; Ali Yapar; Funda Akleman

doi:10.1109/LMWC.2011.2167138

Complex permittivity determination of dielectric materials by waveguide measurements: A robust approach based on integral equations

Emre Kiliç^*, Ali Yapar, Funda Akleman

^*Corresponding author for this work

Department of Electronics and Communication Engineering

Technical University of Munich

Research output: Contribution to journal › Article › peer-review

9 Citations (Scopus)

Abstract

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.

Original language	English
Article number	6036002
Pages (from-to)	631-633
Number of pages	3
Journal	IEEE Microwave and Wireless Components Letters
Volume	21
Issue number	11
DOIs	https://doi.org/10.1109/LMWC.2011.2167138
Publication status	Published - Nov 2011

Funding

Manuscript received May 11, 2011; accepted August 04, 2011. Date of publication October 06, 2011; date of current version November 09, 2011. This work was supported by The Scientific and Technological Research Council of Turkey (TUBITAK) under grant 108E146. E. Kılıç is with Lehrstuhl für Hochfrequenztechnik, Technische Universität München, Munich 80333, Germany. A. Yapar and F. Akleman are with the Department of Electronics and Communications Engineering, Istanbul Technical University, Maslak, Istanbul, Turkey (e-mail: [email protected]). Color versions of one or more of the figures in this letter are available online at http://ieeexplore.ieee.org. Digital Object Identifier 10.1109/LMWC.2011.2167138

Funders	Funder number
TUBITAK	108E146
Türkiye Bilimsel ve Teknolojik Araştirma Kurumu

Keywords

Complex dielectric permittivity
dielectric loaded waveguide
inverse problem

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10.1109/LMWC.2011.2167138

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AB - 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.

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KW - inverse problem

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Complex permittivity determination of dielectric materials by waveguide measurements: A robust approach based on integral equations

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