Issues Pertaining to Dielectric Assessment of Soil Moisture in a Coaxial Cell
Abstract
The study considered a pre-existing coaxial cell design and attempted to improve upon the accuracy of the coaxial cell as a measurement device. The cell was modeled with a revised transmission line model. Simulations were conducted using MatLab and were compared to data taken from an Agilent Vector Network Analyzer using Root Mean Square Error (RMSE) analysis to estimate the relative permittivity of samples contained in the coaxial cell's sample chamber. It was found that while the new transmission line model was more rigorous in its representation of the coaxial cell, accuracy was still very limited. As a result, the coaxial cell should be redesigned to eliminate possible complications resulting from its current structure. A transmission line model may not be complex enough to properly represent the cell.
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- OSU Theses [15752]