Computer-aided permittivity measurements of moistened and pyrolized materials in strong RF fields (part II)

In a previous paper [1], we proposed a computer-aided permittivity measurements (CAPM) system and presented the results on moistened paper samples, exposed to strong RF fields inside a microwave cavity. In this paper, we further develop the proposed CAPM system and present the results of permittivity measurements on moistened wood and ceramic samples. A method to correct the measured sample weight for the effects of the microwave leakage radiation pressure is described. The achievement of optimum heating and drying rates is discussed in detail. A block diagram of overall computational procedure for permittivity measurements by using the CAPM system is illustrated. In addition, the measurements error analysis is pursued according to the computational procedure.