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Moisture-dependent models for microwave complex permittivity and loss factor of spring oats kernels: A comparative study

P.N.Singh, Z.Ahmad, H.N.Singh, R.N.Jha, A.Prasad

In the present work we have proposed two models namely, quadratic and cubic, for the variation of relative permittivity and dielectric loss factor of spring oats (Avena sativa L.) with decimalmoisture content at 2.45 GHz. The results for relative permittivity and loss factor have been derived from the works of S.O. Nelson and themodels chosen for comparisonwith the present models are also due to Nelson. The evaluation of constants for the models has been done using the method of least -squares-fit for non-linear regression analysis. The values of the coefficients of determination (r2) too close to unity and lower average percentage errors in both of our models (6.08 and 3.09 for relative permittivity and 5.94 and 12.09 for the loss factor) compare our models favorably with the established models.