Microwave Dielectric Properties of Four Types of Rhizomes from Zingiberaceace Family

Aziz, Nor Azila Abd; Hassan, Jumiah; Abbas, Zulkifly; Osman, Nurul Huda

doi:10.21315/jps2017.28.1.2

Cited by 7 publications

(8 citation statements)

References 7 publications

(8 reference statements)

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“…The analyses on both port networks perceived the importance of the interference response and transmitted information to identify dielectric properties. Furthermore, by using the permittivity value in Aziz et al [ 41 ], the semi-solid samples of Java turmeric, Mango ginger, Black Turmeric and Turmeric are 𝜀′ of 34.52, 45.6, 46.68 and 58.61, respectively, at less than 2.5 GHz resonant frequency. In addition, concerning the dielectric properties of the present samples, the quality factor of the compact resonator-sensors was decreased.…”

Section: Triple-rings Csrr Design and Validationmentioning

confidence: 99%

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Detection of Semi-Solid Materials Utilizing Triple-Rings CSRR Microwave Sensor

Al-Gburi

Rahman

Zakaria

et al. 2023

Sensors

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This article proposes the design, fabrication and measurement of a triple-rings complementary split-ring resonator (CSRR) microwave sensor for semi-solid material detection. The triple-rings CSRR sensor was developed based on the CSRR configuration with curve-feed designed together, utilizing a high-frequency structure simulator (HFSS) microwave studio. The designed triple rings CSRR sensor resonates at 2.5 GHz, performs in transmission mode, and senses shift in frequency. Six cases of the sample under tests (SUTs) were simulated and measured. These SUTs are Air (without SUT), Java turmeric, Mango ginger, Black Turmeric, Turmeric, and Di-water, and detailed sensitivity analysis is conducted for the frequency resonant at 2.5 GHz. The semi-solid tested mechanism is undertaken using a polypropylene (PP) tube. The samples of dielectric material are filled into PP tube channels and loaded in the CSRR centre hole. The e-fields near the resonator will affect the interaction with the SUTs. The finalized CSRR triple-rings sensor was incorporated with defective ground structure (DGS) to deliver high-performance characteristics in microstrip circuits, leading to a high Q-factor magnitude. The suggested sensor has a Q-factor of 520 at 2.5 GHz with high sensitivity of about 4.806 and 4.773 for Di-water and Turmeric samples, respectively. The relationship between loss tangent, permittivity, and Q-factor at the resonant frequency has been compared and discussed. These given outcomes make the presented sensor ideal for detecting semi-solid materials.

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Section: Triple-rings Csrr Design and Validationmentioning

confidence: 99%

“…The polynomial fitting technique is employed for determining the unknown SUTs’ permittivity based on the reference permittivity (Aziz et al [ 41 ]). The difference between the two reference datasets and the simulated permittivity was analyzed based on permittivity with the inclusion of SUTs.…”

Section: Fabrication Measurement and Characterizationsmentioning

confidence: 99%

Detection of Semi-Solid Materials Utilizing Triple-Rings CSRR Microwave Sensor

Al-Gburi

Rahman

Zakaria

et al. 2023

Sensors

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“…To prove the sensor achievement, the sensor that was suggested was evaluated using several semisolid materials as SUTs. Furthermore, by using the permittivity value provided by Aziz et al [ 56 ], the semisolid samples of Javanese turmeric, mango ginger, black turmeric, and turmeric had an ε ′ of 34.52, 45.6, 46.68, and 58.61, respectively, at less than the 2.5 GHz resonant frequency. The frequency response of the MDGS CSIW sensor was demonstrated with several SUTs with different dielectric properties as illustrated in Figure 14 .…”

Section: Samples Under Test (Suts)mentioning

confidence: 99%

“…The advantages of the presented sensor using a polypropylene tube (PP) for the SUT channel can prevent sample drop and time corrections [ 53 , 54 , 55 ]. To test semisolid materials with their high dielectric properties and use in Zingiberaceae families [ 56 ], sensors must be highly sensitive to accurately monitor semisolid concentrations. The proposed sensor has a Q-factor of 700 and a sensitivity of 2.864 at 2.45 GHz.…”

Section: Introductionmentioning

confidence: 99%

Realizing the High Q-Factor of a CSIW Microwave Resonator Based on an MDGS for Semisolid Material Characterization

Al-Gburi¹,

Rahman

Zakaria³

et al. 2023

Micromachines

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In this work, the high-quality factor (Q-factor) and high sensitivity of a circular substrate-integrated waveguide (CSIW) are proposed for the characterization of semisolid materials. The modeled sensor was designed based on the CSIW structure with a mill-shaped defective ground structure (MDGS) to improve measurement sensitivity. The designed sensor oscillates at a single frequency of 2.45 GHz, which was simulated using an Ansys HFSS simulator. Electromagnetic simulation explains the basis of the mode resonance of all two-port resonators. Six variations of the materials under test (SUTs) were simulated and measured, including air (without an SUT), Javanese turmeric, mango ginger, black turmeric, turmeric, and distilled water (DI). A detailed sensitivity calculation was performed for the resonance band at 2.45 GHz. The SUT test mechanism was performed using a polypropylene tube (PP). The samples of dielectric material were filled into the channels of the PP tube and loaded into the center hole of the MDGS. The E-fields around the sensor affect the relationship with the SUTs, resulting in a high Q-factor value. The final sensor had a Q-factor of 700 and a sensitivity of 2.864 at 2.45 GHz. Due to the high sensitivity of the presented sensor for characterization of various semisolid penetrations, the sensor is also of interest for accurate estimation of solute concentration in liquid media. Finally, the relationship between the loss tangent, permittivity, and Q-factor at the resonant frequency were derived and investigated. These results make the presented resonator ideal for the characterization of semisolid materials.

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“…A suitable amount of GO (0.1g) was dispersed in 10 ml of toluene using ultrasonication. The dispersed solution was added to (0.1 g, 10 ml toluene) of Cu(II) complex with 0.5 ml of Et3N [43]. The reaction solution was stirred and refluxed at 50 °C for 5 h. The solid was collected via filtration, washed with toluene to remove the unreacted moieties, and left to dry.…”

Section: Immobilization Of the Prepared Complex On Graphene Oxidementioning

confidence: 99%

Studying the Characteristics and Performance of a New Heterogeneous Catalyst Pre-templated Using Cu(II) Schiff Base Complex on reducing 4-nitrophenol.

Abdel‐Rahman

Mohammed

Ahmed

et al. 2023

Sohag Journal of Sciences

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The conversion of nitro compounds to their corresponding amino compounds by reduction route is a significant chemical reaction from an industrial and environmental standpoint. In the present paper, copper Schiff base complex was successfully prepared from the reaction between (1, 1 -(pyridine-2,3-dimethyl imino methyl)naphthalene-2,2 -diol) and Cu(CH3COO)2 salt. This was successfully characterized with different techniques and grafted over graphene oxide (GO) as support after functionalizing it via chemical grafting using aminopropyltriethoxysilane (APTES) as a linker to obtain the functionalized form (FGO). The new heterogeneous complex (CuMGO) was depicted using physicochemical and spectroscopic tools such as FT-IR, UV-Vis, SEM, XRD, Raman spectroscopy, and XPS. The results manifest that Cu(II) imine complex was successfully immobilized on GO. The resulting catalyst was used to reduce 4-nitrophenol (4-NP) to its corresponding amine 4-aminophenol (4-AP) at room temperature in case of using hydrazine hydrate as a reducing agent. It showed good activity with a percent of conversion (44.4%) and an apparent rate constant of 2.06 × 10-3 min-1 in about 130 min. The prepared catalyst can be recycled five times without losing its activity.

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Microwave Dielectric Properties of Four Types of Rhizomes from Zingiberaceace Family

Abstract: To cite this article: Abd. Aziz, N. A. et al. (2017

Cited by 7 publications

References 7 publications

Detection of Semi-Solid Materials Utilizing Triple-Rings CSRR Microwave Sensor

Detection of Semi-Solid Materials Utilizing Triple-Rings CSRR Microwave Sensor

Realizing the High Q-Factor of a CSIW Microwave Resonator Based on an MDGS for Semisolid Material Characterization

Studying the Characteristics and Performance of a New Heterogeneous Catalyst Pre-templated Using Cu(II) Schiff Base Complex on reducing 4-nitrophenol.

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