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Complex Dielectric Measurements of Forest Fire Ash at X-Band Frequencies

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3 Author(s)
Baum, T. ; Sch. of Electr. & Comput. Eng., R. Melbourne Inst. of Technol. Univ., Melbourne, VIC, Australia ; Thompson, L. ; Ghorbani, K.

Dielectric measurements of powdered forest fire ash have been investigated and presented using the Nicholson-Ross-Weir method within a WR-90 waveguide (X-band 8-12 GHz). The dielectric measurements of five samples have been outlined and taken at a room temperature of 22.8 °C. Permittivity ε for five different species has been presented within this letter. These include Eucalypt, Bracken Fern, She Oak, Wattle, and Cypress. The Eucalypt sample was tested dry and with a 30% moisture content by weight. The dry Eucalypt sample was found to have a permittivity value of approximately 2.32 ± 0.025 with a loss tangent of 0.005 ± 0.0025.

Published in:

Geoscience and Remote Sensing Letters, IEEE  (Volume:8 ,  Issue: 5 )