Title :
Free-space transmission method for wide-band microwave wheat permittivity measurements
Author :
Trabelsi, S. ; Kraszewski, A.W. ; Nelson, S.O.
Author_Institution :
U.S. Dept. of Agric., Athens, GA, USA
Abstract :
A free-space transmission technique was used to determine the dielectric properties of wheat at frequencies from 4 to 12 GHz. Undesirable effects such as multiple reflections and diffraction at the edges of the sample were minimized by selecting optimum conditions and use of a microwave focused beam.
Keywords :
agriculture; horn antennas; lens antennas; microwave reflectometry; network analysers; permittivity measurement; time-domain reflectometry; 4 to 12 GHz; S-parameter test set; dielectric properties; edge diffraction elimination; free-space transmission method; horn/lens antennas; microwave focused beam; multiple reflections elimination; nondestructive method; optimum conditions; time-domain gating; vector NWA; wheat permittivity measurement; wideband microwave measurement; Antenna measurements; Attenuation; Dielectric materials; Dielectric measurements; Microwave measurements; Microwave theory and techniques; Moisture; Optical reflection; Permittivity measurement; Wideband;
Conference_Titel :
Precision Electromagnetic Measurements Digest, 1998 Conference on
Conference_Location :
Washington, DC, USA
Print_ISBN :
0-7803-5018-9
DOI :
10.1109/CPEM.1998.700043
