Abstract
This paper proposes a microstrip wide-ring sensor for percentage of broken rice determination based on transmission power measurement. The microstrip wide-ring sensor with low insertion loss was designed to operate at frequency range from 1 GHz to 3 GHz. Calibration equations for measurement of percentage of broken rice at 1.93 GHz and 2.50 GHz were obtained and validated with white rice for percentage of broken rice ranging from 0% to 100%. The lowest error in percentage of broken rice prediction was 11.03% at 1.93 GHz.
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