Title :
Measuring frequency- and temperature-dependent permittivities of food materials
Author :
Nelson, Stuart O. ; Bartley, Philip G., Jr.
Author_Institution :
U.S. Dept. of Agric., Athens, GA, USA
fDate :
6/23/1905 12:00:00 AM
Abstract :
An open-ended coaxial-line probe was used with sample temperature control equipment designed for use with the probe to measure permittivities of some liquid, semisolid, and pulverized food materials as a function of frequency and temperature. Graphical data for the dielectric constant and loss factor of homogenized macaroni and cheese, ground whole-wheat flour, and apple juice illustrate the diverse frequency- and temperature-dependent behavior of food materials and the need for measurements when reliable permittivity data are required
Keywords :
UHF measurement; dielectric heating; food processing industry; microwave heating; microwave measurement; permittivity measurement; 5 to 100 C; apple juice; food materials; frequency-dependent permittivity; homogenized macaroni and cheese; liquid food; loss factor; microwave cooking; open-ended coaxial-line probe; permittivity measurement; pulverized food; round whole-wheat flour; sample temperature control; semisolid food; temperature-dependent permittivity; Coaxial components; Dielectric loss measurement; Dielectric materials; Dielectric measurements; Frequency measurement; Land surface temperature; Permittivity measurement; Probes; Temperature control; Temperature measurement;
Conference_Titel :
Instrumentation and Measurement Technology Conference, 2001. IMTC 2001. Proceedings of the 18th IEEE
Print_ISBN :
0-7803-6646-8
DOI :
10.1109/IMTC.2001.928225
