Permittivity measurement of materials of different natures

Georget, Élodie; Diaby, Fatimata; Abdeddaïm, Redha; Sabouroux, Pierre

doi:10.1109/eucap.2014.6901958

Cited by 3 publications

(2 citation statements)

References 15 publications

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“…The length L = 3 mm of the sample holder, and the distance d 1 = d 2 = 96 mm. The total volume of the sample holder is 0.7 cm 3 [ 31 ]. Before the sample measurements, a calibration procedure must be performed.…”

Section: Methodsmentioning

confidence: 99%

Dielectric and Biological Characterization of Liver Tissue in a High-Fat Diet Mouse Model

Buisson

Mounien

Sicard³

et al. 2023

Sensors

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Hepatic steatosis may be caused by type 2 diabetes or obesity and is one of the origins of chronic liver disease. A non-invasive technique based on microwave propagation can be a good solution to monitor hepatic tissue pathologies. The present work is devoted to the dielectric permittivity measurements in healthy and fatty liver in the microwave range. A mouse model following normal and high sugar/glucose (HFS) diets was used. We demonstrated the change in the triglyceride and glucose concentration in the hepatic tissue of HFS diet mice. The difference in the dielectric permittivity of healthy and fatty liver was observed in the range from 100 MHz to 2 GHz. The dielectric permittivity was found to be 42 in the healthy tissue and 31 in the fatty liver tissue at 1 GHz. The obtained results demonstrate that dielectric permittivity can be a sensitive tool to distinguish between healthy and fatty hepatic tissue.

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Section: Methodsmentioning

confidence: 99%

Dielectric and Biological Characterization of Liver Tissue in a High-Fat Diet Mouse Model

Buisson

Mounien

Sicard³

et al. 2023

Sensors

Self Cite

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“…Te NRW method only needs the refection and transmission coefcients and can calculate both the complex permittivity and complex permeability, which the standard recommends [7][8][9]. Te measurement process is easy to implement for materials with good rigidity [10]. However, for thin fexible materials, bending and deformations are prone to occur during clamping, as specimens 2 and 3 in Figure 1, which will result in inaccurate measurement results.…”

Section: Introductionmentioning

confidence: 99%

An Effective Method for Electromagnetic Parameter Measurement of Flexible Materials Based on Air Coaxial Line

Ren

Sheng

Zhou

2022

International Journal of Antennas and Propagation

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When measuring the electromagnetic parameters of flexible material with an air coaxial line, the specimen is prone to bend and deform in the fixture, which results in erroneous results. In order to solve this problem, this paper proposes a new measurement method. Firstly, a rigid material is selected and loaded into the air coaxial line for two-port S parameters measurement. Then, the flexible material is attached to one end of the rigid material and loaded into the air coaxial line together for repeated two-port S parameter measurement. According to the S parameters measured and the two-port network cascading theory, the S parameters of the flexible material separately loaded in the fixture can be deduced. Finally, the electromagnetic parameters of the flexible material can be calculated by the Nicolson−Ross−Weir (NRW) method. Experimental results show that the method proposed is effective and reliable.

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A Nondestructive Testing Method for the Determination of the Complex Refractive Index Using Ultra Wideband Radar in Industrial Applications

Choudhary

Rönnow

2020

Sensors

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An ultra-wide band radar reflection measurement technique for industrial applications is introduced. A new method for determining the complex refractive index (or equivalently the relative permittivity) of objects with planar interfaces is presented. The object thickness can also be obtained experimentally. The method is a combination of time and frequency domain techniques. The objects can be finite in size and at a finite distance. The limits in size and distance for the method to be valid are experimentally investigated. The method is relatively insensitive to hardware impairments such as frequency dependence of antennas and analog front end. The method is designed for industrial in-line measurements on objects on conveyor belts. Results are presented for solid wood and wood chips; the complex refractive index is determined in the frequency range 0.5 to 2.0 GHz for the moisture content of 3.6–10% for solid wood and 30–50% for wood chips. Polarimetric measurements are used; wood and wood chips are anisotropic.

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Permittivity measurement of materials of different natures

Cited by 3 publications

References 15 publications

Dielectric and Biological Characterization of Liver Tissue in a High-Fat Diet Mouse Model

Dielectric and Biological Characterization of Liver Tissue in a High-Fat Diet Mouse Model

An Effective Method for Electromagnetic Parameter Measurement of Flexible Materials Based on Air Coaxial Line

A Nondestructive Testing Method for the Determination of the Complex Refractive Index Using Ultra Wideband Radar in Industrial Applications

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