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Development Of Impedance Spectroscopy Based In-Situ, Self-Calibrating, On-Board Wireless Sensor With Inbuilt Metamaterial Inspired Small Antenna For Constituent Detection In Multi-Phase Mixtures Like Soil, Gunjan Pandey
Gunjan Pandey
Real time and accurate measurement of sub-surface soil moisture and nutrients is critical for agricultural and environmental studies. This work presents a novel on-board solution for a robust, accurate and self-calibrating soil moisture and nutrient sensor with inbuilt wireless transmission and reception capability that makes it ideally suited to act as a node in a network spread over a large area. The sensor works on the principle of soil impedance measurement by comparing the amplitude and phase of signals incident on and reflected from the soil in proximity of the sensor. The permittivity of the soil dielectric mixture which is …