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Applied physics

, Volume 25, Issue 3, pp 351–355 | Cite as

Microwave measurements and modelling of the permittivity of tropical vegetation samples

  • H. S. Tan
Photophysics, Laser Chemistry

Abstract

Microwave measurements of tropical vegetation samples (grass, casuarina, rubber leaf, rubber wood) at 9.5 GHz as a function of moisture content at 21°C are presented. A comparison is made with results calculated from six models for the permittivity of dielectric mixtures. Of these, only one of the models due to Polder, van Santen, and deLoor is found to give reasonable agreement, particularly for the real part of the permittivity. It is clear that more complex formulations for the permittivity of vegetation are necessary to model its behaviour as a function of moisture content and frequency.

PACS

77.20 42.10,06 

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References

  1. 1.
    A.K. Fung, H.S. Fung: IEEE Trans. GE-15, 189 (1977)Google Scholar
  2. 2.
    N.L. Carlson: “Dielectric Constant of Vegetation at 8.5 GHz”, Technical Report 1903-5, Electroscience Lab., Ohio State University, Columbus (March 1967)Google Scholar
  3. 3.
    D. Polder, J.H. van Santen: Physica12, 257 (1946)CrossRefADSGoogle Scholar
  4. 4.
    G.P. deLoor: Microwave Power3, 67 (1968)Google Scholar
  5. 5.
    A.K. Fung, F.T. Ulaby: “A Scatter Model for Leafy Vegetation”, Proc. AGARD Conference No. 244, Cambridge, Mass. (1977)Google Scholar
  6. 6.
    A. Kraszewski: J. Appl. Phys.47, 1275 (1976)CrossRefADSGoogle Scholar
  7. 7.
    A. Kraszewski: J. Microwave Power12, 215 (1977)Google Scholar
  8. 8.
    H. Looyenga: Physica31, 401 (1965)CrossRefADSGoogle Scholar
  9. 9.
    L.D. Landau, E.M. Lifshitz:Electrodynamics of Continuous Media (Addison-Wesley, Reading, MA 1960) p. 46zbMATHGoogle Scholar
  10. 10.
    G.P. deLoor, F.W. Meijboom: J. Food Tech.1, 313 (1966)Google Scholar
  11. 11.
    W.R. Tinga, S.O. Nelson: J. Microwave Power8, 23 (1973)Google Scholar
  12. 12.
    R.F. Harrington:Tine-Harmonic Electromagnetic Fields (McGraw-Hill, New York 1961) p. 322Google Scholar
  13. 13.
    J.L. Altman:Microwave Circuits (Van Nostrand, Princeton, NJ 1964) p. 412Google Scholar

Copyright information

© Springer-Verlag 1981

Authors and Affiliations

  • H. S. Tan
    • 1
  1. 1.Department of Electrical EngineeringUniversity of MalayaKuala LumpurMalaysia

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