Title :
Observations on resonant cavity perturbation by dielectric objects
Author :
Kraszewski, A.W. ; Nelson, S.O.
Author_Institution :
US Dept. of Agric., Athens, GA
fDate :
1/1/1992 12:00:00 AM
Abstract :
Microwave resonators can be used as sensors for sorting dielectric objects. Differences in volume or mass can be distinguished among objects of irregular shape but of uniform dielectric properties. Moisture content, or other permittivity-dependent qualities can also be distinguished independent of mass or volume when objects are of uniform shape. Fundamental principles of the shape-independent and size-independent measurements are discussed, and experimental results are presented
Keywords :
cavity resonators; electric sensing devices; microwave devices; microwave measurement; moisture measurement; permittivity measurement; spatial variables measurement; dielectric objects; dielectric objects sorting; microwave resonators; moisture content; permittivity-dependent qualities; resonant cavity perturbation; sensors; shape independent measurements; size-independent measurements; uniform dielectric properties; Dielectric constant; Dielectric materials; Dielectric measurements; Moisture measurement; Permittivity measurement; Q factor; Resonance; Resonant frequency; Shape measurement; Sorting;
Journal_Title :
Microwave Theory and Techniques, IEEE Transactions on
