scholarly journals A THEORETICAL STUDY TO DESIGN A MICROWAVE RESONATOR FOR SENSING APPLICATIONS

2021 ◽  
Vol 25 (Special) ◽  
pp. 1-41-1-48
Author(s):  
*Russul K. Abdulsattar ◽  
◽  
Zaid A. Abdul hassain ◽  
Taha A. Elwi ◽  
◽  
...  
Keyword(s):  
Crude Oil ◽  
Transmission Line ◽  
Electric Fields ◽  
Low Cost ◽  
Oil Quality ◽  
Water Concentration ◽  
Ring Resonators ◽  
Sensing Applications ◽  
Microwave Sensor ◽  
Moisture Detection

This paper presents a microwave sensor design for moisture detection contents in petroleum productions based on metamaterials. The proposed sensor occupies a compacted size of 40×40×1.6 mm3 by using low-cost FR4 substrate. The proposed sensor consists of a transmission line and two split-ring resonators (SRRs) mounted on two sides. The transmission line is coupled to the outer ring of the SRRs to provide two resonant frequencies at 1.03 GHz and 3.04 GHz. It is observed that most of the electric fields fringing is come out of the air gap on the SRRs. Two pans are mounted on the sensor to contain the sample under test (SUT). The simulation studies are carried out by using the Computer Simulation Technology (CST) Microwave studio. After introducing the pans, frequency shifts, △f1=150 MHz and △f2=424 MHz, are detected in the resonant frequency which is associated with the perturbation phenomenon when the water concentration is varied from 0% to 100%. The proposed sensor exhibits a reliable detection percentage of various different amounts of the moisture content in crude oil introductions. Generally, a good detection methodology is discovered by applying the proposed sensor for detecting the crude oil quality productions.

scholarly journals Substrate-Integrated Waveguide Microwave Sensor for Water-in-Diesel Fuel Applications

2021 ◽  
Vol 11 (21) ◽  
pp. 10454
Author(s):  
Antonella Maria Loconsole ◽  
Vito Vincenzo Francione ◽  
Vincenza Portosi ◽  
Onofrio Losito ◽  
Michele Catalano ◽  
...  
Keyword(s):  
Diesel Fuel ◽  
Low Cost ◽  
Water Concentration ◽  
Wide Band ◽  
Coefficient Of Determination ◽  
Substrate Integrated Waveguide ◽  
Scattering Parameter ◽  
Low Profile ◽  
Waveguiding Structure ◽  
Microwave Sensor

A water-in-diesel microwave sensor based on a substrate integrated waveguide (SIW) microwave applicator is designed and characterized in this study. The interaction between the microwave electromagnetic field and the diesel fuel contaminated with small concentrations of water is obtained via suitable radiating slots placed on the top of an SIW waveguiding structure. The SIW applicator working frequency is chosen by observing the behavior of the complex dielectric permittivity of the fuel–water blend based on a preliminary wide band investigation. The performances of the SIW microwave sensor are evaluated in terms of scattering parameter modulus |S21| as a function of the water concentration in ppm. The best sensitivity Δ|S21|Δρ=1.42 mdB/ppm is obtained at a frequency of f=9.76 GHz, with a coefficient of determination R2=0.94. The sensor is low-cost, low profile and ensures a good sensitivity for constant and real-time monitoring.

Computer simulation study about the dependence of amorphous silicon photonic waveguides efficiency on the material quality

2020 ◽  
Vol 90 (3) ◽  
pp. 30502
Author(s):  
Alessandro Fantoni ◽  
João Costa ◽  
Paulo Lourenço ◽  
Manuela Vieira
Keyword(s):  
Amorphous Silicon ◽  
High Throughput Screening ◽  
Simulation Analysis ◽  
Low Cost ◽  
Deposition Process ◽  
Large Area ◽  
Sidewall Roughness ◽  
Sensing Applications ◽  
Fabrication Defects ◽  
The Impact

Amorphous silicon PECVD photonic integrated devices are promising candidates for low cost sensing applications. This manuscript reports a simulation analysis about the impact on the overall efficiency caused by the lithography imperfections in the deposition process. The tolerance to the fabrication defects of a photonic sensor based on surface plasmonic resonance is analysed. The simulations are performed with FDTD and BPM algorithms. The device is a plasmonic interferometer composed by an a-Si:H waveguide covered by a thin gold layer. The sensing analysis is performed by equally splitting the input light into two arms, allowing the sensor to be calibrated by its reference arm. Two different 1 × 2 power splitter configurations are presented: a directional coupler and a multimode interference splitter. The waveguide sidewall roughness is considered as the major negative effect caused by deposition imperfections. The simulation results show that plasmonic effects can be excited in the interferometric waveguide structure, allowing a sensing device with enough sensitivity to support the functioning of a bio sensor for high throughput screening. In addition, the good tolerance to the waveguide wall roughness, points out the PECVD deposition technique as reliable method for the overall sensor system to be produced in a low-cost system. The large area deposition of photonics structures, allowed by the PECVD method, can be explored to design a multiplexed system for analysis of multiple biomarkers to further increase the tolerance to fabrication defects.

Electro-inductive Wave Transmission Line based Microfluidic Microwave Sensor

2020 ◽  
Author(s):  
Marta Gil ◽  
Paris Velez ◽  
Francisco Aznar-Ballesta ◽  
Aran Mesenger-Ruiz ◽  
Jonatan Munoz-Enano ◽  
...  
Keyword(s):  
Transmission Line ◽  
Wave Transmission ◽  
Microwave Sensor

scholarly journals Current Trends in Polymer Based Sensors

Chemosensors ◽  
2021 ◽  
Vol 9 (5) ◽  
pp. 108
Author(s):  
Giancarla Alberti ◽  
Camilla Zanoni ◽  
Vittorio Losi ◽  
Lisa Rita Magnaghi ◽  
Raffaela Biesuz
Keyword(s):  
Chemical Structure ◽  
Low Cost ◽  
Sensing Applications ◽  
Current Trends ◽  
Manufacturing Methods ◽  
New Devices

This review illustrates various types of polymer and nanocomposite polymeric based sensors used in a wide variety of devices. Moreover, it provides an overview of the trends and challenges in sensor research. As fundamental components of new devices, polymers play an important role in sensing applications. Indeed, polymers offer many advantages for sensor technologies: their manufacturing methods are pretty simple, they are relatively low-cost materials, and they can be functionalized and placed on different substrates. Polymers can participate in sensing mechanisms or act as supports for the sensing units. Another good quality of polymer-based materials is that their chemical structure can be modified to enhance their reactivity, biocompatibility, resistance to degradation, and flexibility.

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