Article 2022 · 35 citations

Complex Permittivity and Thickness Evaluation of Low-Loss Dielectrics From Uncalibrated Free-Space Time-Domain Measurements

Hasar, Ugur Cem, Kaya, Yunus, Ozturk, Hamdullah, Izginli, Mucahit, Barroso, Joaquim Jose, Ramahi, Omar M., Ertugrul, Mehmet

Abstract

A free-space time-domain method is proposed to retrieve dielectric constant (epsilon r), conductivity (sigma e), and thickness (d) of metal-backed low-loss dielectric samples using calibration-independent reflected power peak measurements. Its algorithm is validated by numerical calculations and simulations (CST Microwave Studio) using a sine-modulated Gaussian window. A sensitivity analysis is followed to examine its performance considering the dependencies of reflected power peaks with respect to epsilon r and sigma e. Free-space time-domain measurements have been implemented after transforming frequency-domain measurements into time-domain ones to extract epsilon r, sigma e, and d of polypropylene, polyethylene, and polyoxymethylene samples.

Keywords

Time-domain analysis Antenna measurements Transmission line measurements Permittivity measurement Thickness measurement Temperature measurement Broadband antennas Complex permittivity free-space metal-backed reflection-only thickness time-domain REFLECTION RECONSTRUCTION

WoS Categories

Geochemistry & Geophysics Engineering, Electrical & Electronic Remote Sensing Imaging Science & Photographic Technology

Citation

Journal: IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING
Year: 2022
Volume: 60
ISSN: 0196-2892
eISSN: 1558-0644
DOI: 10.1109/TGRS.2021.3090712
WoS UID: WOS:000732803800001

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