Design and Development of Microstrip Sensor with Triple Frequency for Determination of Rice Grains Moisture Content

The micro strip moisture sensor is designed and developed with triple frequency, for determination of rice grain moisture content at 4.9GHz, 6.7GHz and 8GHz, with good return loss, as well as good bandwidth. The numerically and experimentally analyzed data using moisture sensor was for dry rice as well as wet rice. The proposed antenna is designed with substrate εr = 4.3, h =0.038mm, tan δ = 0.001, as well as the parameters length and width are 10mm and radius is 2.1mm, simulated by CST software and measuring by the vector network analyzer (Model No. N9925A). The proposed design is useful for agricultural field, for determining the moisture content as well as low cost, small size, easy to fabricate, accuracy, less time consuming.