High-Q Sensor Based on Symmetrical Split Ring Resonator With Spurlines for Solids Material Detection

Alahnomi, Rammah A.; Zakaria, Zahriladha; Ruslan, Eliyana; Rashid, Siti Rosmaniza Ab; Bahar, Amyrul Azuan Mohd

doi:10.1109/jsen.2017.2682266

Cited by 112 publications

(49 citation statements)

References 25 publications

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“…The complex permittivity values (𝜀 𝑟 ′ and tanδ) of MUT are extracted by feeding the experiment data into the BP neural network algorithm, and the results are presented in Table . It can be noticed that the obtained permittivity data consistent with the referred values available in the literature . The maximum error in the real part of the dielectric property (ε r ′) of the selected MUT is between 0.31% and 3.42%, while the maximum errors in loss tangent part (tanδ) are between 0.63% and 3.39%, respectively.…”

Section: Experimental Measurement Set‐up and Resultssupporting

confidence: 83%

Symmetric coplanar waveguide sensor loaded with interdigital capacitor for permittivity characterization

Sun

Guo

et al. 2019

Int J RF Microw Comput Aided Eng

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This article presents the developing of interdigital capacitor (IDC) based symmetric coplanar waveguide (CPW) sensor to characterize the complex permittivity of unknown dielectric sheets. The symmetric structure is realized by using two identical 3 dB CPW dividers where each branch is loaded with an IDC unit. The proposed method is designed using three, five, and seven fingers of the IDC unit, and the measurement sensitivity is analyzed accordingly. The permittivity of tested samples is extracted by the genetic algorithm. To validate the robust sensing performance of the proposed method, simulation and experimental tests are performed and analyzed, and the accuracy is compared with published values. The proposed method gives the maximum error of 3.42%. With the feature of high-sensitivity, the proposed sensor can be used as an excellent candidate for determining the permittivity of materials in microwave frequencies.K E Y W O R D S coplanar waveguide, high sensitivity, interdigital capacitor, permittivity extraction, symmetric sensor

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Section: Experimental Measurement Set‐up and Resultssupporting

confidence: 83%

Symmetric coplanar waveguide sensor loaded with interdigital capacitor for permittivity characterization

Sun

Guo

et al. 2019

Int J RF Microw Comput Aided Eng

View full text Add to dashboard Cite

show abstract

“…The accurate measurement of dielectric constants of solid and liquid materials has an important significance in medical, industrial, chemical and biological fields [ 1 , 2 , 3 ]. At present, the instruments used to measure the dielectric constant of objects are relatively expensive.…”

Section: Introductionmentioning

confidence: 99%

Design of a High Sensitivity Microwave Sensor for Liquid Dielectric Constant Measurement

Hao

Wang

et al. 2020

Sensors

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In order to improve the sensitivity of liquid dielectric constant measurements, a liquid dielectric constant sensor based on a cubic container structure is proposed for the first time. The cubic container, which consists of a dielectric substrate with a split resonant ring (SRR) and microstrip lines, can enhance the electric field intensity in the measuring area. High sensitivity can be obtained from measuring the dielectric constant with the characteristics of the structure resonate. The research results show that the resonant frequency of the sensor is shifted from 7.69 GHz to 5.70 GHz, with about a 2 GHz frequency offset, when the dielectric constant of the sample varied from 1 to 10. A resonance frequency offset of 200 MHz for the per unit dielectric constant is achieved, which is excellent regarding performance. The permittivity of oil with a different metal content is measured by using the relation between the fitted permittivity and the resonant frequency. The relative error is less than 1.5% and the sensitivity of measuring is up to 3.45%.

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“…The measured frequency range was 7.075-7.2 GHz, and the measurement error of the dielectric constant did not exceed 6%. A novel planar symmetric splitter ring resonating cavity (SSRR) sensor structure was proposed in the literature [20]. The sensor was used to characterize the dielectric properties of common solid materials.…”

Section: Introductionmentioning

confidence: 99%

Design of Substrate-Integrated Waveguide Loading Multiple Complementary Open Resonant Rings (CSRRs) for Dielectric Constant Measurement

Hao

Wang

2020

Sensors

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In order to solve the low-sensitivity problem of the dielectric constant with the resonant cavity method, a sensor based on a substrate-integrated waveguide structure loaded with a multi-complementary open resonant ring is proposed. With the enhanced resonance characteristics of the sensor, this design realized the measurement of complex dielectric constants in a wide range. The frequency selectivity of the sensor is improved by the high-quality factor of the substrate-integrated waveguide. By loading three complementary resonant rings with different opening directions in the ground plane, a deeper notch and better out-of-band suppression are achieved. The effect of the complex dielectric constant on both resonant frequency and quality factor is discussed by calculating the material under test with a known dielectric constant. Simulation and experimental results show that a resonance frequency offset of 102 MHz for the per unit dielectric constant is achieved. A wide frequency offset is the prerequisite for accurate measurement. The measurement results of four plates match well with the standard values, with a relative error of the real part of the dielectric constant of less than 2% and an error of less than 0.0099 for the imaginary part.

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High-Q Sensor Based on Symmetrical Split Ring Resonator With Spurlines for Solids Material Detection

Cited by 112 publications

References 25 publications

Symmetric coplanar waveguide sensor loaded with interdigital capacitor for permittivity characterization

Symmetric coplanar waveguide sensor loaded with interdigital capacitor for permittivity characterization

Design of a High Sensitivity Microwave Sensor for Liquid Dielectric Constant Measurement

Design of Substrate-Integrated Waveguide Loading Multiple Complementary Open Resonant Rings (CSRRs) for Dielectric Constant Measurement

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