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A Fast and Accurate Amplitude-Only Transmission-Reflection Method for Complex Permittivity Determination of Lossy Materials

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1 Author(s)
Hasar, U.C. ; Dept. of Electr. & Electron. Eng., Ataturk Univ., Erzurum

Complex scattering parameter measurements using expensive vector network analyzers make microwave techniques inconvenient for industrial-based applications. In industry, accurate and fast evaluation of materials' properties using a relatively inexpensive measurement setup is a key issue. In this paper, we derive an objective function for fast and accurate complex permittivity (epsiv) determination of lossy materials using amplitude-only reflection and transmission scattering parameter measurements. The measurements can be carried out by relatively inexpensive microwave instruments such as a scalar network analyzer. The domain for computations of the epsiv is significantly reduced to facilitate rapid epsiv determination. The objective function is verified by measurements of a commercially available antifreeze solution and binary mixture of ethyl alcohol and water solution.

Published in:

Microwave Theory and Techniques, IEEE Transactions on  (Volume:56 ,  Issue: 9 )

Date of Publication:

September 2008

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