Wheat permittivity measurements in free space

Journal of Microwave Power and Electromagnetic Energy

Volumn 31, Issue 3, 1996, Pages 135-141

  Kraszewski, A W ^a   Trabelsi, S ^a   Nelson, S O ^a  

^a RUSSELL RESEARCH CENTER   (United States)

Author keywords

Dielectric constant; Dielectric loss factor; Dielectric properties; Measurements; Permittivity; Wheat

Indexed keywords

CALCULATIONS; DENSITY (SPECIFIC GRAVITY); DIELECTRIC MATERIALS; ELECTROMAGNETIC WAVE ATTENUATION; ELECTROMAGNETIC WAVE DIFFRACTION; ELECTROMAGNETIC WAVE TRANSMISSION; GRAIN (AGRICULTURAL PRODUCT); MICROWAVE MEASUREMENT; MOISTURE; PERMITTIVITY; PHASE SHIFT; TEMPERATURE;

DIELECTRIC LOSS FACTORS; FREE SPACE TRANSMISSION TECHNIQUES; GRAIN MOISTURE METERS; WHEAT;

PERMITTIVITY MEASUREMENT;

EID: 0030381516     PISSN: 08327823     EISSN: None     Source Type: Journal    
DOI: 10.1080/08327823.1996.11688304     Document Type: Article

References (12)

1. ASAE Standards. 1995. ASAE S352.2 Moisture measurement - unground grain and seeds. Am. Soc. Agric. Engrs., St. Joseph, MI.
2. Bussey, H.E. 1967. Measurement of the RF properties of materials - a survey. Proc. IEEE 55(6): 1046-1053.
3. Ghodgaonkar, D.K., Varadan, V.V.., and Varadan, V.K. 1989. A free-space method for measurement of dielectric constants and loss tangents at microwave frequencies. IEEE Trans. Instrum. and Meas. 37(3): 789-793.
4. Hallikainen, M.T. and Ulaby, F.T. 1986. Interpretation of free-space dielectric measurements. University of Michigan, Ann Arbor, Radiation Laboratory, Internal Report, 022486-2-T.
5. Jonscher, A.K. 1983. Dielectric Relaxation in Solids. Chelsea Dielectric Press, London, UK, p. 463.
6. Kraszewski, A., Kulinski, S., and Stosio, Z. 1977. A preliminary study on microwave monitoring of moisture content in wheat. J. Microwave Power 12: 241-252.
7. Kraszewski, A. and Nelson, S.O. 1989. Composite model of the complex permittivity of cereal grain. J. Agric. Eng. Res. 43: 211-219.
8. Kraszewski, A. and Nelson, S.O. 1990. Study on grain permittivity measurements in free space. J. Microwave Power & Electromagn. Energy 25: 202-210.
9. Kraszewski, A.W. and Nelson, S.O. 1992. Wheat moisture content and bulk density determination by microwave parameters measurement. Canadian Agric. Eng. 34(4): 327-335.
10. Kraszewski, A.W., Trabelsi, S., and Nelson, S.O. 1995. Microwave dielectric properties of wheat. Proc. 30th IMPI Microwave Power Symp., Denver, CO, pp. 90-93.
11. Nelson, S.O. 1984. Density dependence of the dielectric properties of wheat and whole-wheat flour. J. Microwave Power 19: 55-64.
12. Nelson S.O. and Stetson, L.E. 1976. Frequency and moisture dependence of the dielectric properties of hard red winter wheat. J. Agric. Eng. Res. 21: 181-192.