Title :
Accurate measurements of complex permittivity of liquid based on a TM010 mode cylindrical cavity method
Author :
Kawabata, Hirokazu ; Kobayashi, Yoshio
Author_Institution :
Dept. of Electr. & Electron. Syst., Saitama Univ., Japan
Abstract :
Accurate values of complex permittivity of two kinds of liquids have been measured by using a TM010 mode cylindrical cavity method. The conventional cavity perturbation method is improved on the basis of the rigorous analysis by the Ritz-Galerkin method, where the effects of sample insertion holes, a dielectric tube, and air-gap between a dielectric tube and sample insertion holes are taken into account. Actually, the values of the complex permittivity of ethanol and milk were measured as functions of the weight percentage of ethanol to water and the milk fat percentage, respectively. These measured results are useful to estimate the content percentage.
Keywords :
Galerkin method; dairy products; dielectric liquids; microwave measurement; organic compounds; permittivity measurement; Ritz-Galerkin method; TM010 mode; air gap; cavity perturbation method; cylindrical cavity method; dielectric tube; ethanol; liquid complex permittivity; milk; sample insertion holes; Cavity perturbation methods; Coaxial components; Dairy products; Dielectric measurements; Electric variables measurement; Ethanol; Frequency measurement; Liquids; Permittivity measurement; Q measurement;
Conference_Titel :
Microwave Conference, 2005 European
Print_ISBN :
2-9600551-2-8
DOI :
10.1109/EUMC.2005.1608870
