Differential Narrow Bandpass Microstrip Filter Design for Material and Liquid Purity Interrogation

Amirian, Mohsen; Karimi, Gholamreza; Wiltshire, Benjamin D.; Zarifi, Mohammad H.

doi:10.1109/jsen.2019.2932693

Cited by 17 publications

(6 citation statements)

References 45 publications

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“…Novel strategies are being adopted to improve sensitivity and selectivity using microwave spectroscopy, but no one has yet demonstrated the feasibility of distinguishing low concentrations of similar substances in water. Amirian et al [ 56 ] simulated the feasibility of distinguishing between pure liquid materials, such as ethanol, ammonia, benzene and pentene using a novel sensor design and mathematical approach, reaching higher sensitivity and noise reduction. Harnsoongnoen et al [ 57 ] demonstrated the discrimination of organic and inorganic materials using planar sensors and principal component analysis (PCA).…”

Section: Functionalised Electromagnetic Wave Sensorsmentioning

confidence: 99%

Real-Time Water Quality Monitoring with Chemical Sensors

Yaroshenko

Kirsanov

Marjanovic

et al. 2020

Sensors

127

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Water quality is one of the most critical indicators of environmental pollution and it affects all of us. Water contamination can be accidental or intentional and the consequences are drastic unless the appropriate measures are adopted on the spot. This review provides a critical assessment of the applicability of various technologies for real-time water quality monitoring, focusing on those that have been reportedly tested in real-life scenarios. Specifically, the performance of sensors based on molecularly imprinted polymers is evaluated in detail, also giving insights into their principle of operation, stability in real on-site applications and mass production options. Such characteristics as sensing range and limit of detection are given for the most promising systems, that were verified outside of laboratory conditions. Then, novel trends of using microwave spectroscopy and chemical materials integration for achieving a higher sensitivity to and selectivity of pollutants in water are described.

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Section: Functionalised Electromagnetic Wave Sensorsmentioning

confidence: 99%

Real-Time Water Quality Monitoring with Chemical Sensors

Yaroshenko

Kirsanov

Marjanovic

et al. 2020

Sensors

127

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“…The GlucoSense factor was defined to evaluate the sensitivity of this sensor. Narrow bandwidth structure is a suitable choice in sensory applications to detect various basic blood parameters [52]. This study presents an attempt to detect the glucose level in human blood samples using a new microstrip sensor structure based on variations in resonant frequencies.…”

Section: Introductionmentioning

confidence: 99%

Low-cost microstrip sensor based on coupled step line (CSL) resonator for blood plasma glucose determination

Amirian,

Karimi

2024

Meas. Sci. Technol.

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In this paper, a microstrip sensor structure was designed and implemented to detect blood glucose levels (BGL) based on changes in resonant frequencies, achieved by creating couplings at sensitive regions. A coupled step line (CSL) was used to create a sensitive region on the sensor suitable for BGL testing. Transmission matrix theory was employed for the mathematical analysis to obtain the resonant frequency. Received Blood samples from 50 different patients were centrifuged, and their serums were extracted to study the performance of the microchip sensor. By placing individual serum samples (50 µl) at the sensitive region of the sensor, the scattering parameters of the sensor were measured to investigate the resonant frequency variation. In addition, the effects of basic blood parameters were analyzed based on the amount of frequency shift. High sensitivity, suitable quality (Q) factor, compact size, and acceptable reproducibility of the measured results are important features of the developed sensor.

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“…Probably, the most extended approach for sensing using microwaves is frequency variation [ 1 , 2 , 3 , 4 , 5 , 6 , 7 , 8 , 9 , 10 , 11 , 12 , 13 , 14 , 15 , 16 , 17 , 18 , 19 , 20 , 21 , 22 , 23 , 24 ], where, typically, a planar resonant element combined with a transmission line constitutes the sensing (microwave) part of the sensor. Frequency-variation sensors have been applied to the determination of the complex dielectric constant of solids and liquids [ 3 , 5 , 6 , 7 , 10 , 17 , 18 , 19 , 20 , 21 , 22 , 23 , 24 ], from the measurement of the resonance frequency and magnitude variation caused by the so-called material under test (MUT). Permittivity sensors based on frequency splitting have been also recently reported [ 25 , 26 , 27 , 28 , 29 , 30 , 31 , 32 , 33 , 34 , 35 ].…”

Section: Introductionmentioning

confidence: 99%

Planar Phase-Variation Microwave Sensors for Material Characterization: A Review and Comparison of Various Approaches

Muñoz-Enano

Coromina

Vélez

et al. 2021

Sensors

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Planar phase-variation microwave sensors have attracted increasing interest in recent years since they combine the advantages of planar technology (including low cost, low profile, and sensor integration with the associated circuitry for post-processing and communication purposes, among others) and the possibility of operation at a single frequency (thereby reducing the costs of the associated electronics). This paper reviews and compares three different strategies for sensitivity improvement in such phase-variation sensors (devoted to material characterization). The considered approaches include line elongation (through meandering), dispersion engineering (by considering slow-wave artificial transmission lines), and reflective-mode sensors based on step-impedance open-ended lines. It is shown that unprecedented sensitivities compatible with small sensing regions are achievable with the latter approach.

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Differential Narrow Bandpass Microstrip Filter Design for Material and Liquid Purity Interrogation

Cited by 17 publications

References 45 publications

Real-Time Water Quality Monitoring with Chemical Sensors

Real-Time Water Quality Monitoring with Chemical Sensors

Low-cost microstrip sensor based on coupled step line (CSL) resonator for blood plasma glucose determination

Planar Phase-Variation Microwave Sensors for Material Characterization: A Review and Comparison of Various Approaches

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