Microwave measurements of coal

Constantine Balanis, W. S. Rice, N. S. Smith

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

In this investigation dielectric constant and loss tangent values of coal samples were computed from measurements made at microwave frequencies (8.2–12.4 GHz). Two different waveguide methods were used in the measurements. One technique utilized a finite sample and two reactive terminations, and the other required the use of an infinite sample simulated in the laboratory by a very long specimen. For each of the two Pittsburgh seam coal samples, dielectric constant and loss tangent variations were also measured as a function of moisture. Typical moisture contents of 10% and 15% were examined. Electromagnetic propagation through a single layer of coal seam was then investigated analytically as a function of coal depth.

Original languageEnglish (US)
Pages (from-to)413-418
Number of pages6
JournalRadio Science
Volume11
Issue number4
DOIs
StatePublished - 1976
Externally publishedYes

Fingerprint

Microwave measurement
coal seam
coal
Coal
microwaves
Dielectric losses
tangents
dielectric loss
moisture content
Permittivity
Moisture
moisture
electromagnetic wave transmission
permittivity
Microwave frequencies
microwave frequencies
Waveguides
waveguides
loss
microwave

ASJC Scopus subject areas

  • Earth and Planetary Sciences(all)
  • Electrical and Electronic Engineering
  • Condensed Matter Physics

Cite this

Microwave measurements of coal. / Balanis, Constantine; Rice, W. S.; Smith, N. S.

In: Radio Science, Vol. 11, No. 4, 1976, p. 413-418.

Research output: Contribution to journalArticle

Balanis, C, Rice, WS & Smith, NS 1976, 'Microwave measurements of coal', Radio Science, vol. 11, no. 4, pp. 413-418. https://doi.org/10.1029/RS011i004p00413
Balanis, Constantine ; Rice, W. S. ; Smith, N. S. / Microwave measurements of coal. In: Radio Science. 1976 ; Vol. 11, No. 4. pp. 413-418.
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