scholarly journals Microwave Interferometry Based On Open-ended Coaxial Technique for High Sensitivity Liquid Sensing

2017 ◽  
Vol 6 (3) ◽  
pp. 88 ◽  
Author(s):  
H. Bakli ◽  
K. Haddadi
Keyword(s):  
Sodium Chloride ◽  
Dielectric Permittivity ◽  
High Sensitivity ◽  
Calibration Model ◽  
Liquid Media ◽  
Dielectric Characterization ◽  
Sodium Chloride Solutions ◽  
Microwave Dielectric ◽  
Local Properties ◽  
Liquid Sensing

This paper describes a modified open-ended coaxial technique for microwave dielectric characterization in liquid media. A calibration model is developed to relate the measured transmission coefficient to the local properties of the sample under test. As a demonstration, the permittivity of different sodium chloride solutions is experimentally determined. Accuracies of 0.17% and 0.19% are obtained respectively for the real and imaginary parts of dielectric permittivity at 5.9 GHz.

High Sensitivity Electrical Properties Measurement of Graphene-based Composites using Interferometric Near-field Microwave Technique

2021 ◽  
Author(s):  
HIND BAKLI ◽  
Mohamed MOUALHI ◽  
Mourad Makhlouf
Keyword(s):  
Composite Material ◽  
Composite Materials ◽  
Electrical Properties ◽  
Near Field ◽  
High Sensitivity ◽  
Calibration Model ◽  
Electrical Model ◽  
Microwave Technique ◽  
Lumped Elements ◽  
Local Properties

Abstract High sensitivity electrical properties measurement of composite materials using an interferometric near-field microwave technique is proposed in this paper. A one-port calibration model is developed to relate the measured transmission coefficient to the local properties of the material. To represent the probe-composite sample interaction, an electrical model based on lumped elements is developed. As a demonstration, complex permittivity and conductivity of composite materials prepared with polyvinyl chloride (PVC) and different concentration of graphene are experimentally determined at 2.45 GHz. The obtained results show that the proposed technique is sensitive for the detection of small contrast of permittivity and conductivity in composite material. When graphene concentration increases from 1 to 30%, the conductivity increases from 0.0061 s/m to 0.056 s/m.

scholarly journals Compact Inner-Wall Grating Slot Microring Resonator for Label-Free Sensing

Sensors ◽  
2019 ◽  
Vol 19 (22) ◽  
pp. 5038 ◽  
Author(s):  
Hongjun Gu ◽  
He Gong ◽  
Chunxue Wang ◽  
Xiaoqiang Sun ◽  
Xibin Wang ◽  
...  
Keyword(s):  
Refractive Index ◽  
Sodium Chloride ◽  
High Sensitivity ◽  
Microring Resonator ◽  
Silicon On Insulator ◽  
Label Free ◽  
Detection Range ◽  
Sodium Chloride Solutions ◽  
Sensing Application ◽  
Index Unit

In this paper, we present and analyze a compact inner-wall grating slot microring resonator (IG-SMRR) with the footprint of less than 13 μm × 13 μm on the silicon-on-insulator (SOI) platform for label-free sensing, which comprises a slot microring resonator (SMRR) and inner-wall grating (IG). Its detection range is significantly enhanced without the limitation of the free spectral region (FSR) owing to the combination of SMRR and IG. The IG-SMRR has an ultra-large quasi-FSR of 84.5 nm as the detection range, and enlarged factor is up to over 3 compared with the conventional SMRR. The concentration sensitivities of sodium chloride solutions and D-glucose solutions are 996.91 pm/% and 968.05 pm/%, respectively, and the corresponding refractive index (RI) sensitivities are 559.5 nm/RIU (refractive index unit) and 558.3 nm/RIU, respectively. The investigation on the combination of SMRR and IG is a valuable exploration of label-free sensing application for ultra-large detection range and ultra-high sensitivity in future.

scholarly journals Compact Inner-Wall Grating Slot Microring Resonator for Label-Free Sensing

2019 ◽  
Author(s):  
Hongjun Gu ◽  
He Gong ◽  
Chunxue Wang ◽  
Xiaoqiang Sun ◽  
Xinbin Wang ◽  
...  
Keyword(s):  
Sodium Chloride ◽  
Structural Parameters ◽  
High Sensitivity ◽  
Microring Resonator ◽  
Label Free ◽  
Detection Range ◽  
Sodium Chloride Solutions ◽  
Transmission Properties ◽  
Sensing Application ◽  
Simulation Results

In this paper, we present and analyze a compact inner-wall grating slot microring resonator (IG-SMRR) with the footprint of less than 13 μm × 13 μm on the SOI platform for label-free sensing, which comprises a slot microring resonator (SMRR) and inner-wall grating (IG). Its detection range is significantly enhanced without the limitation of the free spectral region (FSR) owing to the combination of SMRR and IG. Structural parameters of IG and SMRR are investigated and optimized for favorable transmission properties. The simulation results shows that the IG-SMRR has an ultra-large quasi-FSR of 84.6 nm, and the concentration sensitivities of sodium chloride solutions and D-glucose solutions are up to 960.61 pm/% and 933.06 pm/%, respectively. The investigation on the combination of SMRR and IG is a valuable exploration of label-free sensing application for ultra-large detection range and ultra-high sensitivity in future.

Microwave dielectric characterization of bulk ferroelectrics

1998 ◽  
Vol 08 (PR9) ◽  
pp. Pr9-113-Pr9-116 ◽  
Author(s):  
C. M. Weil ◽  
R. G. Geyer ◽  
L. Sengupta
Keyword(s):  
Dielectric Characterization ◽  
Microwave Dielectric

Sub-Solidus Synthesis and Microwave Dielectric Characterization of Plagioclase Feldspars

2005 ◽  
Vol 88 (9) ◽  
pp. 2472-2479 ◽  
Author(s):  
Marjeta Macek Krzmanc ◽  
Matjaz Valant ◽  
Bostjan Jancar ◽  
Danilo Suvorov
Keyword(s):  
Dielectric Characterization ◽  
Microwave Dielectric

Thermodynamic Difference between Protocatechualdehyde andp-Hydroxybenzaldehyde in Aqueous Sodium Chloride Solutions

2017 ◽  
Vol 62 (3) ◽  
pp. 902-912 ◽  
Author(s):  
Jimin Xie ◽  
Min Liu ◽  
Guiqin Liu ◽  
Lixia Yuan ◽  
Dacheng Li ◽  
...  
Keyword(s):  
Sodium Chloride ◽  
Chloride Solutions ◽  
Aqueous Sodium ◽  
Sodium Chloride Solutions
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