Microwave Planar Sensor for Determination of the Permittivity of Dielectric Material

Ismail, Mohd Khairy; Zakaria, Zahriladha; Nornikman, H.; Sam, W. Y.; Abdullah, Arman Shah

doi:10.11591/eei.v7i4.1355

Cited by 2 publications

(2 citation statements)

References 18 publications

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“…Recently, researchers have shown an increased interest in microwave sensors since they are desirable for many important applications such as food industry applications, quality control, surface crack detection, bio-sensing applications and solid and liquid materials detection [1][2][3][4][5][6][7][8][9][10][11]. Microwave planar based sensors can meet the demand in these devices technologies.…”

Section: Introductionmentioning

confidence: 99%

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Enhanced symmetrical split ring resonator for metallic surface crack detection

Alahnomi¹,

Zakaria²,

Yussof³

et al. 2019

TELKOMNIKA

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An enhanced sensor based on symmetrical split ring resonator (SSRR) functioning at microwave frequencies has been proposed in order to detect and characterize the metal crack of the materials. This sensor is based on perturbation theory, in which the dielectric properties of the material affect the quality factor and resonance frequency of the microwave resonator. Conventionally, coaxial cavity, waveguide, dielectric resonator techniques have been used for characterizing materials. However, these techniques are often large, and expensive to build, which restricts their use in many important applications. Thus, the enhanced bio-sensing technique presents advantages such as high measurement sensitivity with the capability of suppressing undesired harmonic spurious and permits potentially metal crack material detection. Hence, using a High Frequency Structure Simulator (HFSS) software, the enhanced sensor is modeled and the reflection S11 is performed for testing the aluminum metal with crack and without crack at the frequency range of 100 MHz to 3GHz. Variation of crack width and depth has been investigated and the most obvious finding emerged from this study is that the ability of detecting a minimum of sub-millimeter crack width and depth which is a round 10 𝛍m width or depth where the minimum shift of reflected frequency is recorded at 6.2 MHz and 3 MHz for crack width and depth respectively. The enhanced SSRR provides high capability of detecting small crack defection by utilizing the interaction between coupled gap resonators and it is useful for various applications such as aircraft fuselages, nuclear power plant steam generator tubing, and steel bridges and for others that can be compromised by metal fatigue.

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Section: Introductionmentioning

confidence: 99%

“…The length (a) dictates the frequency of the notch characteristic. The rejected wavelength can be calculated as [26]:  = (7) where a = the spurline length, and λg = the rejected wavelength. By deriving (7) into the frequency domain as follows [26]:…”

mentioning

confidence: 99%

Enhanced symmetrical split ring resonator for metallic surface crack detection

Alahnomi¹,

Zakaria²,

Yussof³

et al. 2019

TELKOMNIKA

View full text Add to dashboard Cite

show abstract

Planar Microwave Sensor with High Sensitivity for Material Characterization Based on Square Split Ring Resonator (SSRR) for Solid and Liquid

Maizatul Alice Meor Said,

Zahriladha Zakaria,

Mohamad Harris Misran

et al. 2023

EMITTER Int'l J. of Engin. Technol.

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Microwave resonator sensors are the most extensively used sensors in the food industries, quality assurance, medical, and manufacturing. Planar resonant technique is chosen as the medium for characterizing dielectric properties of material due to its compact in size, low cost and easy to fabricate. But these techniques have a low Q-factor and little sensitivity. This work uses the perturbation approach to overcome this technique's flaw, which is that Q-factor and resonant frequency are affected by the resonator's dielectric properties. This suggested sensor operated at 2.5GHz between 1GHz and 4GHz for material characterisation of solid and liquid samples. These sensors were constructed on a substrate made of RT/Duroid Roger 5880, which has a copper layer that is 0.0175 mm thick and has a dielectric constant of 2.2. This square split ring resonator (SSRR) sensor thus generates narrower resonant, low insertion loss, and a high Q-factor value of 430 at 2.5GHz. The SSRR sensor's sensitivity is 98.59%, which is higher than that of past studies. The application of the suggested sensor as a tool for material characterisation, particularly for identifying material attributes, is supported by this findings.

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Microwave Planar Sensor for Determination of the Permittivity of Dielectric Material

Cited by 2 publications

References 18 publications

Enhanced symmetrical split ring resonator for metallic surface crack detection

Enhanced symmetrical split ring resonator for metallic surface crack detection

Planar Microwave Sensor with High Sensitivity for Material Characterization Based on Square Split Ring Resonator (SSRR) for Solid and Liquid

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