Two-channel dual-band microwave EBG sensor for simultaneous dielectric detection of liquids

Parvathi, Kompella S. L.; Gupta, Sandeep K.

doi:10.1016/j.aeue.2021.154099

Cited by 9 publications

(5 citation statements)

References 31 publications

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“…However, in our design, the sensing section and host are coupled, resulting in greatly reduced impedance loading, whereas in Mohammadi et al, 18 the sensing section is directly connected to the host. The sensor in Parvathi and Gupta 29 presents comparable performance, but its average sensitivity is relatively low. The differential microwave sensor for liquid characterization presented in Gan et al 30 utilizes microstrip CSRRs.…”

Section: Measurement Resultsmentioning

confidence: 99%

“…For a detailed performance comparison, the following major designs are considered, [12][13][14][18][19][20][21][22]28,29 based on the performance parameters of sensitivity, permittivity range, sensor type or topology, and material type (solid/ liquid). The normalized sensitivity of the proposed sensor is higher than that of all the reported sensors except the sensor reported in Mohammadi et al, 18 which employs an IDC (inter-digital capacitor) as the sensing element.…”

Section: Measurement Resultsmentioning

confidence: 99%

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Solid materials characterization using split ring resonators enclosed by power divider

Mohammadi,

Kara

2024

Micro & Optical Tech Letters

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A highly sensitive microwave sensor for solid material characterization is proposed. A novel design consisting of split ring resonators (SRRs) within a three‐port power divider is developed. The three‐port junction is employed as the host to provide two output channels, and SRRs are loaded through electric coupling to the power divider as the sensing area. The SRRs are located symmetrically so that any change in the electric field of the SRRs is transferred equally to the transmission coefficients of the three‐port junction. The operation of the proposed sensor is based on the downshifting of the transmission zero caused by the loading of samples. The two identical outputs help to control cross‐sensitivity due to external effects. The performance of the fabricated prototype on a 22.2 × 18.8 × 1.6 mm3 printed circuit board is presented. It is shown that a 135 MHz shift per unit relative permittivity change can be achieved. The normalized sensitivity is found to be 3%, which is relatively higher than the sensors reported in the literature.

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Section: Measurement Resultsmentioning

confidence: 99%

Section: Measurement Resultsmentioning

confidence: 99%

Solid materials characterization using split ring resonators enclosed by power divider

Mohammadi,

Kara

2024

Micro & Optical Tech Letters

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“…In the design of microwave sensors, the relative permittivity of the test sample is crucial. For instance, microwave sensors have been built to operate between frequencies of 1 GHz and 6 GHz for measuring samples with high relative permittivity values ( ε r = 20 to 82) [ 27 , 28 , 29 ]. Microwave sensors are commonly built for frequencies between 7 GHz and 14 GHz for the characterization of samples with medium relative permittivity values ( ε r = 4 to 20) [ 30 , 31 ] and between 14 GHz and 30 GHz for the measurement of low permittivity materials ( ε r = 1 to 4) [ 32 , 33 ].…”

Section: Introductionmentioning

confidence: 99%

Rapid Design Optimization and Calibration of Microwave Sensors Based on Equivalent Complementary Resonators for High Sensitivity and Low Fabrication Tolerance

Haq

Koziel

2023

Sensors

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This paper presents the design, optimization, and calibration of multivariable resonators for microwave dielectric sensors. An optimization technique for the circular complementary split ring resonator (CC-SRR) and square complementary split ring resonator (SC-SRR) is presented to achieve the required transmission response in a precise manner. The optimized resonators are manufactured using a standard photolithographic technique and measured for fabrication tolerance. The fabricated sensor is presented for the high-resolution characterization of dielectric substrates and oil samples. A three-dimensional dielectric container is attached to the sensor and acts as a pool for the sample under test (SUT). In the presented technique, the dielectric substrates and oil samples can interact directly with the electromagnetic (EM) field emitted from the resonator. For the sake of sensor calibration, a relation between the relative permittivity of the dielectric samples and the resonant frequency of the sensor is established in the form of an inverse regression model. Comparisons with state-of-the-art sensors indicate the superiority of the presented design in terms of oil characterization reliability. The significant technical contributions of this work include the employment of the rigorous optimization of geometry parameters of the sensor, leading to its superior performance, and the development and application of the inverse-model-based calibration procedure.

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“…17,18 The multiband MRS can measure several samples, which are called multi-sensing MRSs. 19,20 The MRSs can measure one/several sample. The MRS can detect the substance type according to the permittivity amount.…”

Section: Introductionmentioning

confidence: 99%

“…The MRS can measure in single band 16 and multiband 17,18 . The multiband MRS can measure several samples, which are called multi‐sensing MRSs 19,20 . The MRSs can measure one/several sample.…”

Section: Introductionmentioning

confidence: 99%

Permittivity measurement of fluidics with high‐sensitivity by chandelier form microwave sensor

Navaei,

Rezaei

2023

Micro & Optical Tech Letters

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In this manuscript, a microwave resonance sensor (MRS) was presented composed of interdigital structure, meander structure, chandelier‐form, and T‐shaped structure. The combination of four structures results in a good electromagnetic field strength at the sensing location. It caused increased sensitivity. Due to the high use of methanol in industry, samples have been selected from this material. The samples used are methanol and water solution and place on location sensing. For measurement was used samples with 80% methanol with a permittivity of 59%–10% methanol with a permittivity of 77. Also, tissue samples including sheep, chicken and fish have been used to measure the proposed sensor. The resonance frequency of the samples changes in the range of 2.14‐1.46 GHz. The sensitivity of the presented MRS is 2.6% and the Q‐factor is 1252.

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Two-channel dual-band microwave EBG sensor for simultaneous dielectric detection of liquids

Cited by 9 publications

References 31 publications

Solid materials characterization using split ring resonators enclosed by power divider

Solid materials characterization using split ring resonators enclosed by power divider

Rapid Design Optimization and Calibration of Microwave Sensors Based on Equivalent Complementary Resonators for High Sensitivity and Low Fabrication Tolerance

Permittivity measurement of fluidics with high‐sensitivity by chandelier form microwave sensor

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