A symmetric bar chart-shape microwave sensor with high <i>Q</i>-factor for permittivity determination of fluidics

Navaei, Moein; Rezaei, Pejman; Kiani, Sina

doi:10.1017/s1759078723000053

Cited by 19 publications

(3 citation statements)

References 74 publications

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“…3. There are some important characteristics for a sensor including sensitivity, frequency detection resolution (FDR), and quality factor [53][54][55] where Table 1 compares the performance of PFRS with that of the conventional single-port ones. Inspecting the results, the proposed PFRS enhances the performance of such sensors.…”

Section: Senor Design and Characterizationmentioning

confidence: 99%

On-body non-invasive glucose monitoring sensor based on high figure of merit (FoM) surface plasmonic microwave resonator

Soltanian,

Nosrati,

Mobayen

et al. 2023

Sci Rep

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High-figure of merit (FoM) plasmonic microwave resonator is researched as a non-invasive on-body sensor to monitor the human body's blood glucose variation rate in adults for biomedical applications, e.g., diabetic patients. The resonance frequencies of the proposed sensor are measured to be around $${f}_{01}=3.25$$ f 01 = 3.25 GHz and $${f}_{01}=4.67$$ f 01 = 4.67 GHz over the frequency band of DC to 6GHz which are suitable for monitoring interstitial fluid (ISF) changing rate. The $$40\times 40 {\mathrm{mm}}^{2}$$ 40 × 40 mm 2 sensor is experimentally wrapped on the human body arm to monitor the blood glucose changing rate via amplitude and frequency variations of the sensor. Amplitude variation and frequency shift are measured to be around 7 dB and 30 MHz, respectively. The measured results demonstrate the high precision of the proposed approach to depict a valid diagram for glucose changing rate due to good impedance matching of the designed microwave sensor and human body. The sensor is shown to enhance the sensitivity by a factor of 5 compared to the conventional ones.

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Section: Senor Design and Characterizationmentioning

confidence: 99%

On-body non-invasive glucose monitoring sensor based on high figure of merit (FoM) surface plasmonic microwave resonator

Soltanian,

Nosrati,

Mobayen

et al. 2023

Sci Rep

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show abstract

“…Microwave sensors, when juxtaposed with their optical and electrochemical equivalents, bring to the table a plethora of benefits. Notable amongst these are their compactness, ease of portability, the ability to perform label-free detection, CMOS/PCB compatibility [1,2], and paramountly, the feature of noncontact sensing [3][4][5][6][7][8][9]. These compact, cost-effective designs can deliver a high level of accuracy and sensitivity [3], making them highly attractive for a wide range of applications with various readout modes including single-/multi-frequency variation [10], amplitude/power variation [11], and phase variation [12][13][14] monitoring.…”

Section: Introductionmentioning

confidence: 99%

AI-Assisted Ultra-High-Sensitivity/Resolution Active-Coupled CSRR-Based Sensor with Embedded Selectivity

Abdolrazzaghi

Kazemi

Nayyeri

et al. 2023

Sensors

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This research explores the application of an artificial intelligence (AI)-assisted approach to enhance the selectivity of microwave sensors used for liquid mixture sensing. We utilized a planar microwave sensor comprising two coupled rectangular complementary split-ring resonators operating at 2.45 GHz to establish a highly sensitive capacitive region. The sensor’s quality factor was markedly improved from 70 to approximately 2700 through the incorporation of a regenerative amplifier to compensate for losses. A deep neural network (DNN) technique is employed to characterize mixtures of methanol, ethanol, and water, using the frequency, amplitude, and quality factor as inputs. However, the DNN approach is found to be effective solely for binary mixtures, with a maximum concentration error of 4.3%. To improve selectivity for ternary mixtures, we employed a more sophisticated machine learning algorithm, the convolutional neural network (CNN), using the entire transmission response as the 1-D input. This resulted in a significant improvement in selectivity, limiting the maximum percentage error to just 0.7% (≈6-fold accuracy enhancement).

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“…8 One of the resonator types is the complementary SRR [54][55][56] technique that can change the field intensity. This type of resonator, which is a supplementary model of SRR, 57,58 can increase the Q-Factor 59 and simultaneously, it can increase the sensitivity with it. 60 In this paper, a microwave sensor is designed and implemented using MRS to sense material permittivity.…”

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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A symmetric bar chart-shape microwave sensor with high Q-factor for permittivity determination of fluidics

Cited by 19 publications

References 74 publications

On-body non-invasive glucose monitoring sensor based on high figure of merit (FoM) surface plasmonic microwave resonator

On-body non-invasive glucose monitoring sensor based on high figure of merit (FoM) surface plasmonic microwave resonator

AI-Assisted Ultra-High-Sensitivity/Resolution Active-Coupled CSRR-Based Sensor with Embedded Selectivity

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

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