Results 11 to 20 of about 11,806 (297)

A FDR Sensor for Measuring Complex Soil Dielectric Permittivity in the 10–500 MHz Frequency Range

open access: yesSensors, 2010
Mechanical details as well as electrical models of FDR (frequency domain reflectometry) sensors for the measurement of the complex dielectric permittivity of porous materials are presented.
Wojciech Skierucha, Andrzej Wilczek
doaj   +2 more sources

Expansion of the Analytical Modeling of Capacitance for 1-N-1 Multilayered CID Structures with Monotonically Increasing/Decreasing Permittivity

open access: yesSensors, 2023
Capacitive sensors that utilize the Coplanar Interdigitated (CID) electrode structure are widely employed in various technical and analytical domains, such as healthcare, infectious disease management, pharmaceuticals, metrology, and environmental ...
Anwar Ulla Khan
doaj   +2 more sources

Low-Cost Oil Quality Sensor Based on Changes in Complex Permittivity [PDF]

open access: yesSensors, 2011
Real time oil quality monitoring techniques help to protect important industry assets, minimize downtime and reduce maintenance costs. The measurement of a lubricant’s complex permittivity is an effective indicator of the oil degradation process and it can be useful in condition based maintenance (CBM) to select the most adequate oil replacement ...
Angel Torres Pérez, Mark Hadfield
openaire   +5 more sources

Accuracy Bounds and Measurements of a Contactless Permittivity Sensor for Gases Using Synchronized Low-Cost mm-Wave Frequency Modulated Continuous Wave Radar Transceivers

open access: yesSensors, 2019
A primary concern in a multitude of industrial processes is the precise monitoring of gaseous substances to ensure proper operating conditions. However, many traditional technologies are not suitable for operation under harsh environmental conditions ...
Andreas Och   +7 more
doaj   +3 more sources

Dielectric Permittivity in Copper Leaching: A Review

open access: yesSensors
The leaching process for copper extraction has garnered significant attention due to its critical role in meeting the rising demand for copper, driven by global trends towards decarbonization and electrification.
Marcos Andreu, Robert Zwick, Moe Momayez
doaj   +2 more sources

High-Sensitivity Microwave Sensor Based on an Interdigital-Capacitor-Shaped Defected Ground Structure for Permittivity Characterization

open access: yesSensors, 2019
This study proposes a high-sensitivity microwave sensor based on an interdigital-capacitor-shaped defected ground structure (IDCS-DGS) in a microstrip transmission line for the dielectric characterization of planar materials.
Junho Yeo, Jong-Ig Lee
doaj   +2 more sources

Microwave Sensors Based on Resonant Elements

open access: yesSensors, 2020
This paper highlights interest in the implementation of microwave sensors based on resonant elements, the subject of a special issue in the journal.
Ferran Martín, Paris Vélez, Marta Gil
doaj   +1 more source

Microstrip Sensor Based on Ring Resonator Coupled with Double Square Split Ring Resonator for Solid Material Permittivity Characterization

open access: yesMicromachines, 2023
This paper analyzes a microwave resonator sensor based on a square split-ring resonator operating at 5.122 GHz for permittivity characterization of a material under test (MUT).
Khuzairi Masrakin   +5 more
doaj   +1 more source

An Open-Resonator Sensor for Measuring the Dielectric Properties of Antarctic Ice

open access: yesSensors, 2019
In this paper, the theory behind the design of a microwave sensor for the accurate measurement of firn complex permittivity is presented. This class of microwave sensors, based on the open-coaxial re-entrant cavity method, is specifically designed to ...
Roberto Olmi   +3 more
doaj   +1 more source

Calibration of soil moisture sensors, determination of soil water retention properties for precision irrigation based on soil water content measurements

open access: yesActa Agriculturae Slovenica, 2022
Water is becoming a scarce commodity. Therefore, proper water management in precision irrigation is crucial to increase productivity and reduce the cost of crop production. Precision irrigation is based on measuring the soil water content, which is often
Špela ŽELEZNIKAR   +3 more
doaj   +1 more source

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