Effect of the Coaxial Dielectric Probe Diameter on Its Permittivity Sensing Depth at 2 GHz – Simulation Study

Šarolić, Antonio; Matković, Anđela

doi:10.1109/icecom48045.2019.9163634

Cited by 3 publications

(3 citation statements)

References 5 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The inner diameters are not specified by the manufacturer; however, the probe has been commonly referenced [21,38] to conform to the geometry of the RG405 semirigid coaxial cable [39], having a characteristic impedance of 50 Ω. This conformance has been visually confirmed in this study as accurately as possible by the caliper measurements.…”

Section: Slim-form Probementioning

confidence: 72%

“…The probe response to inhomogeneous materials is very complex and often unknown [16][17][18][19]. When measuring layered materials, the result depends on the probe sensing depth, which should be determined for the used probe [20][21][22][23]. When measuring biological tissues, the result also depends on the contact pressure, which should be regarded during the measurements [24,25].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Dielectric Permittivity Measurement Using Open-Ended Coaxial Probe—Modeling and Simulation Based on the Simple Capacitive-Load Model

Šarolić

Matković

2022

Sensors

View full text Add to dashboard Cite

The study aim was to validate that dielectric permittivity measurement using the open-ended coaxial probe can be reliably modeled using electromagnetic modeling and simulations, followed by the postprocessing calculations based on the simple capacitive-load model. Saline solutions with various NaCl concentrations were used as materials under test (MUTs) to investigate how ionic conductivity affects the model validity. Two different solvers and simulation methods were used: FEKO for the frequency domain and CST for the time domain. Furthermore, we performed physical experiments with the same probe and MUTs, again implementing the capacitive-load model on the measurement data to observe the model validity. Relative error of the capacitive-load model with respect to the reference permittivity values, both in measurements and simulations, was within 10% for all cases except for the measured εr′ of 1M solution at the lowest frequencies. The model yielded average relative errors well below 1% for the physiological saline, which is relevant for biological materials. The error increased for higher concentrations and for the lowest simulated frequencies but was within the declared measurement accuracy of the probe itself. This makes the simple capacitive-load model valid for all analyzed concentrations in the microwave frequency range from 0.5 to 18 GHz.

show abstract

Section: Slim-form Probementioning

confidence: 72%

Section: Introductionmentioning

confidence: 99%

Dielectric Permittivity Measurement Using Open-Ended Coaxial Probe—Modeling and Simulation Based on the Simple Capacitive-Load Model

Šarolić

Matković

2022

Sensors

View full text Add to dashboard Cite

show abstract

“…The [21] discussed and reported the short-term variation monitoring employed widely as multi-geophysical parameters in Latur-Killari regions in western India, the region that witnesses the major earthquake devastation by 1993. The abnormal rise in the temperature of atmosphere higher than 20 °C at height 11200 m has been observed in air-light which is just 100 km far away from the Latur at the period of monsoon.…”

Section: Related Workmentioning

confidence: 99%

Design and Development of Multi-Sensor ADEP for Bore Wells Integrated with IoT Enabled Monitoring Framework

Jenath

et al. 2023

JMC

View full text Add to dashboard Cite

Typically, about 51% of the groundwater satisfies the drinking water worldwide and is regarded as the major source for the purpose of irrigation. Moreover, the monitoring and assessment of groundwater over bore wells is essential to identify the effect of seasonal changes, precipitations, and the extraction of water. Hence, there is a need to design a depth sensor probe for bore wells so as to analyze/monitor the quality of underground water thereby estimating any geophysical variations like landslides/earthquakes. Once the depth sensor probe is designed, the data is collected over wireless sensor network (WSN) medium and is stored in cloud for further monitoring and analyzing purposes. WSN is the major promising technologies that offer the real-time monitoring opportunities for geographical areas. The wireless medium in turn senses and gathers data like rainfall, movement, vibration, moisture, hydrological and geological aspects of soil that helps in better understanding of landslide or earthquake disasters. In this paper, the design and development of geophysical sensor probe for the deep bore well so as to monitor and collect the data like geological and hydrological conditions. The data collected is then transmitted by wireless network to analyze the geological changes which can cause natural disaster and water quality assessment.

show abstract

An Analysis of Open-Ended Coaxial Probe Sensitivity to Heterogeneous Media

Brace

Etoz

2020

Sensors

View full text Add to dashboard Cite

Open-ended coaxial probe spectroscopy is commonly used to determine the dielectric permittivity of biological tissues. However, heterogeneities in the probe sensing region can limit measurement precision and reproducibility. This study presents an analysis of the coaxial probe sensing region to elucidate the effects of heterogeneities on measured permittivity. Coaxial probe spectroscopy at 0.5–20 GHz was numerically simulated while a homogenous background was perturbed with a small inclusion of contrasting permittivity. Shifts in the measured effective permittivity provided a three-dimensional assessment of the probe sensitivity field. Sensitivity was well-approximated by the square of the electric field for each analyzed probe. Smaller probes were more sensitive to heterogeneities throughout their sensing region, but were less sensitive to spectral effects compared to larger probes. The probe sensing diameter was less than 0.5 mm in all directions by multiple metrics. Therefore, small heterogeneities may substantially impact permittivity measurement in biological tissues if located near the probe-tissue interface.

show abstract

Effect of the Coaxial Dielectric Probe Diameter on Its Permittivity Sensing Depth at 2 GHz – Simulation Study

Cited by 3 publications

References 5 publications

Dielectric Permittivity Measurement Using Open-Ended Coaxial Probe—Modeling and Simulation Based on the Simple Capacitive-Load Model

Dielectric Permittivity Measurement Using Open-Ended Coaxial Probe—Modeling and Simulation Based on the Simple Capacitive-Load Model

Design and Development of Multi-Sensor ADEP for Bore Wells Integrated with IoT Enabled Monitoring Framework

An Analysis of Open-Ended Coaxial Probe Sensitivity to Heterogeneous Media

Contact Info

Product

Resources

About