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Latin American applied research

versión impresa ISSN 0327-0793


MEARNCHU, J. et al. A handheld moisture content sensor using coupled-dipole antennas. Lat. Am. appl. res. [online]. 2010, vol.40, n.3, pp.199-206. ISSN 0327-0793.

This paper presents an analysis and design of a handheld moisture content sensor. A dielectric property determination technique was used to measure the magnitudes of the reflection and the coupling coefficients of coupled-dipole antennas. These coefficients were plotted and their intersection determined to obtain the values of and ( and , respectively, are the real and imaginary parts of the relative complex permittivity of the dielectric of interest). Moisture content measurements for paddy at various moisture content levels are shown. Comparison of measurements made by this technique with those made by conventional transmission measurement technique yielded a compensation scheme for error reduction. This sensor is useful for controlling the quality of paddy dried in a continuous microwave drying system process.

Palabras clave : Moisture Content Of Paddy; Magnitude Measurement; Coupled-Dipole Antennas; Moisture Content Sensor.

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