Measurement of low‐loss aqueous solutions permittivity with high detection accuracy by a contact and free‐label resonance microwave sensor

Navaei, Moein; Rezaei, Pejman; Kiani, Sina

doi:10.1002/dac.5417

Cited by 16 publications

(4 citation statements)

References 76 publications

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“…One of the important applications of microwave sensors is determining the dielectric constant of various materials [7][8][9][10][11][12]. By determining the dielectric properties of materials, the type of material can be determined, and one of these methods is the use of bandpass [13] and bandstop filters [14,15] and antenna [16][17][18] structures.…”

Section: Introductionmentioning

confidence: 99%

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

Navaei

Rezaei

Kiani

2023

Int. J. Microw. Wireless Technol.

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This paper introduces a symmetric bar chart-shape (SBCS) microwave sensor for measuring permittivity of fluidic samples. For designing purposes, the introduced sensor was used based on the field changes between the SBCS and rectangular loop microstrip (RLM) structure. When a sample is placed on the sensing location, interaction between SBCS and RLM varies the field intensity. The vinegar samples were combined with water and then they are placed on the sensor. The change in field intensity changes the resonance frequency. However, there is a relationship between the permittivity of samples and the resonance frequencies. The proposed sensor is implemented on the substrate of RO4003C. The relative permittivity of samples changed from 59 to 77 and the resonance frequencies changed from 2.3 to 1.4 GHz. The quality factor is 3544 and the sensitivity is 2.2%.

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Section: Introductionmentioning

confidence: 99%

“…Resonators can appear in different forms in the sensor structure. They can be coupled [9, 36, 41], open loop [12], or circular [16], T and L-shaped [13]. One of the most important types of resonators used in SRR is complementary split-ring resonator (CSRR) [56].…”

Section: Introductionmentioning

confidence: 99%

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

Navaei

Rezaei

Kiani

2023

Int. J. Microw. Wireless Technol.

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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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“…Microwave sensors exploit the interaction of electromagnetic waves with biological tissues [6], [7]. Since blood permittivity weakly changes with glucose concentration [8], [9], [10], [11], [12], [13] research usually focuses on the design of high-Q factor sensors whose sharp response allows to more easily track the resonance frequency shift due to glucose concentration changes [14], [15], [16], [17]. In [18] a sensor with high Q-factor is validated against solid material samples for single and multi-layer configurations, instead in [19] and [20] material properties are determined by a phase variation sensor implemented in microstrip technology.…”

Section: Introductionmentioning

confidence: 99%

Microwave Biomedical Sensors With Stable Response: Basic Idea and Preliminary Numerical Assessments for Blood Glucose Monitoring

Costanzo,

Cuccaro,

Dell’Aversano

et al. 2023

IEEE Access

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Microwave sensors are gaining increasing interest in blood glucose detection, for their potential ability to perform a continuous non-invasive monitoring of the glucose concentration, by relating the change in the blood dielectric properties to a variation in the glucose level. Usually, the involved body part (phantom) is placed on the sensor to perform the reading. However, the placement modality, as well as other external factors not related to the blood glucose concentrations (BGC) (i.e. system noise, environmental temperature, human tissues variations other than blood tissue) may also have an effect on the sensor response, due to the change in the propagation path of the electromagnetic field inside the body part under test. In this work, the variation effects induced on the microwave sensor response by the changes in the thickness and the dielectric properties of skin and fat tissues are analyzed and faced. In particular, to mitigate the above drawback in terms of sensor instability, a solid ''matching layer'' is interposed between the resonant sensor and the phantom under test. A specific optimization procedure is performed to design microwave sensors with a stable response not influenced by variations in tissues different from the blood. Various sensors configurations with related resolution metrics are considered to assess the proposed idea and design methodology. Numerical results confirm the possibility to achieve a good trade-off between the measurement stability against undesired phantom variations and the sensitivity toward blood glucose levels, allowing to discriminate concentrations in the range of [100-300] mg/dL. Antennas, electromagnetics, propagation, measurements. INDEX TERMS

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Measurement of low‐loss aqueous solutions permittivity with high detection accuracy by a contact and free‐label resonance microwave sensor

Cited by 16 publications

References 76 publications

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

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

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

Microwave Biomedical Sensors With Stable Response: Basic Idea and Preliminary Numerical Assessments for Blood Glucose Monitoring

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