Development of Impedance-Based Miniaturized Wireless Water Ice Sensor for Future Planetary Applications

Effect of Electrode Resistance and Stray Capacitance on Measurement of Soil Properties

“…The relative dielectric permittivity is a complex function and it is defined by the equation [30] = ′ + ′′ (2) where is the total relative permittivity ′ is the real relative permittivity and it is related to the stored energy within the medium ′′ is the imaginary relative permittivity and it is related to the dissipation (or loss) of energy within the medium. The real relative permittivity shows the relation with imaginary impedance as [22] ´= −  0 ( 2 + 2 )…”

“…The imaginary relative permittivity is related with real impedance by the equation [22] ´´=  0 ( 2 + 2 )…”

“…The real and imaginary conductivity are related to the relative dielectric permittivity by the equations below [22]…”

“…It is known that the soil has dielectric nature and so, it can be represented by a bulk capacitor and resistor in parallel. Pabari et al [22] used a simplified electrical circuit for the detection of water in soil and lunar soil simulant JSC-1A using the WISN. Lampela et al [27] used electrical circuit for the quartz sand soil and found the impedances for different moisture contents.…”

“…The soil sample may be represented by an electrical equivalent circuit using discrete components [21]. Pabari et al [22] have given a simplified electrical circuit for soil and lunar soil simulant JSC-1A testing using WISN. Macdonald [23] has given various electrical circuits based on electrochemical impedance spectroscopy.…”