Active Sensor Design Based on Large-Signal Stability Analysis with Pole-Zero Identification

A large-signal stability analysis based on Pole-Zero Identification has been applied to design an oscillator-based active sensor for dielectric characterization. A prototype of the oscillator has been manufactured and its performance has been tested over samples of well-known liquids as acetone, methanol and deionized water. Although good results have been obtained for dielectric characterization due to the high selectivity of the proposed sensor, further work is required to enable losses characterization.