Electrical Characteristics of Corn,Wheat,and Soya in the 1-200MHz Range,

摘要

A set of coaxial sample holders together with a measurement and data reduction technique has been developed and applied to the study of the dielectric properties (epsilon*=epsilon'-j(epsilon double prime)) of wheat,corn,and soya over the 1to 200MHz range. Particular attention was given to the behavior of the dielectric properties as a function of percent moisture content,frequency,and packing density. Data were also taken to evaluate the dependence of dielectric properties on temperature and sample holder configuration. Some study was also devoted to the correlation between dielectric constant (epsilon'),loss factor (epsilon double prime),loss tangent (epsilon double prime/epsilon'),and percent moisture content. Particular emphasis was devoted to a study of high moisture corn (up to 40%).