NDLI: Electromagnetic Parameters of Dielectric and Magnetic Mixtures Evaluated by Time-Domain Reflectometry

Content Provider	IEEE Xplore Digital Library
Author	Mattei, E. De Santis, A. Di Matteo, A. Pettinelli, E. Vannaroni, G.
Copyright Year	2004
Abstract	The frequency-domain analysis of time-domain reflectometry (TDR) data can be used to evaluate the electromagnetic (EM) parameters of a sample under test. The goal of this letter was to use TDR to determine EM parameters, assumed to be frequency independent, for various magnetite/glass-beads mixtures. The EM parameters are, in turn, used to determine the velocity and attenuation of propagating waves. The latter quantity is also obtained through the TDR voltage method. Velocities decrease, and attenuations increase with increasing magnetite content. The measurements of the present work are compared with the velocities and attenuations reported in the literature (measured via the network analyzer (NA) and LCR meter techniques). The velocities calculated using the various methods are in good agreement. In contrast, the attenuations determined by fitting the TDR data only agree with the NA measurements at high frequencies (450 MHz), while those obtained by the TDR voltage method match the low-frequency attenuations determined through the LCR meter. The reasons for these behaviors are discussed, and the need for precise handling of the TDR data is emphasized. The TDR fit procedure is recommended to obtain reliable EM parameters of materials.
Sponsorship	IEEE Geoscience and Remote Sensing Society
Starting Page	730
Ending Page	734
Page Count	5
File Size	154857
File Format	PDF
ISSN	1545598X
Volume Number	5
Issue Number	4
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2008-10-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Dielectrics Time domain analysis Reflectometry Attenuation measurement Voltage Velocity measurement Frequency domain analysis Testing Electromagnetic propagation Magnetic analysis time-domain reflectometry (TDR) Attenuation permeability permittivity
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering Geotechnical Engineering and Engineering Geology

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