Robust Extraction of Frequency-Dependent Dielectric Properties from Time Domain Reflectometry

Chih-Ping Lin, Yin Jeh Ngui

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Scopus citations

Abstract

Most dielectric spectroscopy techniques require careful system calibration, tedious measurement, specially designed probes, precise input source and some even involved complicated inversion models. This study presented two robust and model-free signal processing approach to extract frequency-dependent dielectric properties from time domain reflectometry (TDR), namely phase velocity analysis (PVA) and multiple reflection analysis (MRA). PVA determines frequency-dependent apparent dielectric permittivity (ADP) from the top and end reflections in TDR signal. MRA encompasses all multiple reflections of TDR signal to measure the complex dielectric permittivity (CDP) spectrum. This innovative approach involves decomposing the first top reflection and the subsequent multiple reflections from TDR signal, comparing their spectral MRA-ratio and inverting the frequency-dependent CDP from the measured MRA-ratio. Both their reliability were evaluated numerically and experimentally from 10MHz-IGHz. Since they are independent of source function and preceding system mismatches, dielectric spectroscopy can be conveniently conducted in laboratory and field, without complicated system setup and calibration.

Original languageEnglish
Title of host publication2018 12th International Conference on Electromagnetic Wave Interaction with Water and Moist Substances, ISEMA 2018
EditorsWojciech Skierucha, Agnieszka Szyplowska, Agata Pacek-Bieniek, Justyna Szerement, Aleksandra Woszczyk
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Print)9781538645932
DOIs
StatePublished - 20 Aug 2018
Event12th International Conference on Electromagnetic Wave Interaction with Water and Moist Substances, ISEMA 2018 - Lublin, Poland
Duration: 4 Jun 20187 Jun 2018

Publication series

Name2018 12th International Conference on Electromagnetic Wave Interaction with Water and Moist Substances, ISEMA 2018

Conference

Conference12th International Conference on Electromagnetic Wave Interaction with Water and Moist Substances, ISEMA 2018
CountryPoland
CityLublin
Period4/06/187/06/18

Keywords

  • complex dielectric permittivity
  • dielectric spectroscopy
  • multiple reflection analysis
  • phase velocity analysis
  • TDR

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    Lin, C-P., & Ngui, Y. J. (2018). Robust Extraction of Frequency-Dependent Dielectric Properties from Time Domain Reflectometry. In W. Skierucha, A. Szyplowska, A. Pacek-Bieniek, J. Szerement, & A. Woszczyk (Eds.), 2018 12th International Conference on Electromagnetic Wave Interaction with Water and Moist Substances, ISEMA 2018 [8442320] (2018 12th International Conference on Electromagnetic Wave Interaction with Water and Moist Substances, ISEMA 2018). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/ISEMA.2018.8442320