Complex Permittivity Determination of Lossy Materials at Millimeter and Terahertz Frequencies Using Free-Space Amplitude Measurements

A free-space measurement method has been proposed for complex permittivity determination of lossy materials at millimeter and terahertz frequencies. The method relies on the Fabry-Perot interference effect between two identical samples separated by a varying air region. We derived a general metric f...

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Bibliographic Details
Published in:Journal of electromagnetic waves and applications 2011-01, Vol.25 (14-15), p.2100-2109
Main Authors: Hasar, U. C., Ozbek, I. Y.
Format: Article
Language:English
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Summary:A free-space measurement method has been proposed for complex permittivity determination of lossy materials at millimeter and terahertz frequencies. The method relies on the Fabry-Perot interference effect between two identical samples separated by a varying air region. We derived a general metric function for fast and accurate complex permittivity determination of lossy materials using intensity data of transmittance power measurements. We have shown that via a graphical method, unique permittivity retrieval is possible using only two measurements of transmittance data corresponding to different distances between identical lossy samples. We have validated the proposed method by performing a numerical analysis.
ISSN:0920-5071
1569-3937
DOI:10.1163/156939311798072153