Results 21 to 30 of about 3,064,923 (268)

Relative Permittivity Measurement of Microliter Volume Liquid Samples through Microwave Filters

Sensors, 2023
This paper proposes a concept of dielectric characterization of low-volume liquid samples using the coupling coefficient of filters. The concept is validated through a two-pole substrate integrated waveguide filter in which the liquid under test is ...
Azhar Yasin, Nayab Gogosh, Syed Irfan Sohail, Syed Muzahir Abbas, Muhammad Farhan Shafique, Abdelhady Mahmoud   +5 more
doaj   +1 more source

Research on a high-sensitivity asymmetric metamaterial structure and its application as microwave sensor

Scientific Reports, 2022
In this paper, an Asymmetric Electric Split-Ring Resonator (AESRR) metamaterial structure is proposed to explore the interaction between metamaterials and electromagnetic waves with the influence of Fano resonance on electromagnetic properties.
Yunhao Cao, Cunjun Ruan, Kanglong Chen, Xingyun Zhang   +3 more
doaj   +1 more source

Calculation of soil water content using dielectric-permittivity-based sensors – benefits of soil-specific calibration [PDF]

Geoscientific Instrumentation, Methods and Data Systems, 2023
Soil water content (SWC) sensors are widely used for scientific studies or for the management of agricultural practices. The most common sensing techniques provide an estimate of volumetric soil water content based on sensing of dielectric permittivity ...
B. M. Zawilski, F. Granouillac, N. Claverie, B. Lemaire, A. Brut, T. Tallec   +5 more
doaj   +1 more source

Low-Cost Electronics for Automatic Classification and Permittivity Estimation of Glycerin Solutions Using a Dielectric Resonator Sensor and Machine Learning Techniques

Sensors, 2023
Glycerin is a versatile organic molecule widely used in the pharmaceutical, food, and cosmetic industries, but it also has a central role in biodiesel refining.
Miguel Monteagudo Honrubia, Javier Matanza Domingo, Francisco Javier Herraiz-Martínez, Romano Giannetti   +3 more
doaj   +1 more source

Highly Sensitive Quartz-Based Sensing System for the Detection of Subpercentage Changes in the Relative Permittivity of Liquids Flowing in Microchannels

Chemosensors, 2021
We describe a highly sensitive quartz sensor for measuring changes in the relative permittivity of liquids flowing in microchannels. The proposed method uses a highly stable oscillator and capacitance-dependent quartz crystal together with a capacitance ...
Vojko Matko, Miro Milanovič
doaj   +1 more source

The Role of Probe Attenuation in the Time-Domain Reflectometry Characterization of Dielectrics [PDF]

, 2010
The influence of the measurement setup on the estimation of dielectric permittivity spectra from time-domain reflectometry (TDR) responses is investigated.
Ferraris, S., Savi, Patrizia, Ferraris S., S. Ferraris, P. Savi, I. A. Maio, Maio, Ivano Adolfo   +6 more
core   +1 more source

Design of a Planar Sensor Based on Split-Ring Resonators for Non-Invasive Permittivity Measurement. [PDF]

, 2023
The permittivity of a material is an important parameter to characterize the degree of polarization of a material and identify components and impurities. This paper presents a non-invasive measurement technique to characterize materials in terms of their
Taha A. Elwi, Patrizia Livreri, Sonia Aïssa, Mohammad Alibakhshikenari, Elwi, Taha, Abdul Hassain, Zaid A., Al-Behadili, Amer, Renu K. R. Jayanthi, Ali, Syed, Livreri, Patrizia, Bal S. Virdee, Aïssa, Sonia, Hassain, Zaid, Mansoor Ali, Syed, Jayanthi, Renu K. R., Pau, Giovanni, Lubangakene, Innocent, Amer Abbood Al-Behadili, Virdee, Bal S., Elwi, Taha A., Jayanthi, Renu, Alibakhshikenari, Mohammad, Giovanni Pau, Zaid A. Abdul Hassain, Virdee, Bal, Syed Mansoor Ali, Al-Behadili, Amer Abbood, Lubangakene, Innocent D., Innocent D. Lubangakene   +28 more
core   +1 more source

A capacitive humidity sensor using cross-linked cellulose acetate butyrate [PDF]

, 2005
This paper reports on the fabrication of a new capacitive humidity sensor having good characteristics and being robust enough to be considered as a component in industrial processes.This sensor is manufactured using a mixture of three cellulose acetate ...
Bernes, Alain, Lacabanne, Colette, Ducéré, Vincent, Labanne, Colette   +3 more
core   +1 more source

CSRR-Based Microwave Sensor for Dielectric Materials Characterization Applied to Soil Water Content Determination

Sensors, 2020
A new and compact sensor based on the complementary split-ring resonator (CSRR) structure is proposed to characterize the relative permittivity of various dielectric materials, enabling the determination of soil water content (SWC).
João G. D. Oliveira, Erica N. M. G. Pinto, Valdemir P. Silva Neto, Adaildo G. D’Assunção   +3 more
doaj   +1 more source

Complementary Metamaterial Sensor for Nondestructive Evaluation of Dielectric Substrates

Sensors, 2019
In this paper, complementary metamaterial sensor is designed for nondestructive evaluation of dielectric substrates. The design concept is based on electromagnetic stored energy in the complementary circular spiral resonator (CCSR), which is concentrated
Tanveer ul Haq, Cunjun Ruan, Xingyun Zhang, Shahid Ullah   +3 more
doaj   +1 more source