An improved design of microwave biosensor for measurement of tissues moisture

Jilani, Muhammad Taha; Wen, Wong Peng; Zakariya, M. A.; Cheong, Lee Yen; Rehman, M. Z. Ur

doi:10.1109/imws-bio.2014.7032445

Cited by 5 publications

(7 citation statements)

References 10 publications

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“…An enhanced coupled high‐impedance MRR has been designed with a resonating frequency of 1 GHz using Roger RT/Duriod 5880 substrate ( ε r = 2.2) with the same design parameters as reported in . The mean radius of ring at designed frequency is 34.87 mm while for a 105 Ω line the corresponding width of 600 μm is used.…”

Section: Analysis and Experimentationmentioning

confidence: 99%

“…It has been reported before that MRR has a potential to evaluate the quality of meat according to their mositure contents . As, main quality issue of meat is water holding capacity (WHC), which is mainly affected by denaturation of protein during postmortem time .…”

Section: Introductionmentioning

confidence: 99%

“…Thus, during the ageing period, reduction in WHC changes the dielectric properties of meat. Whereas, by placing the sample over MRR these attributes can be detected using permittivity variations . This method is based on a principle that, dielectric covering layer can change the effective permittivity of ring‐resonator, thus, changes the resonant frequency .…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Determination of size-independent effective permittivity of an overlay material using microstrip ring resonator

Jilani

Wen

Cheong

et al. 2015

Microw. Opt. Technol. Lett.

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shown in Figure 7 with the simulation data at the same time. The performance summary is shown in Table 1.Core structures of the dual-band SIW filter are the CSRRs and CSRs. Relatively speaking, the influences of other geometrical parameters are not obvious. So that the filter has a potential to be much smaller. As shown in the photograph from Figure 8, length of the SIW is greatly reduced, and the taper microstrips are removed. After adjustment and optimization, its geometrical parameters are: l SIW 5 9 mm, w SIW 5 12 mm, r via 5 1 mm, w via 5 2 mm, w 2 5 1.2 mm, l 1 5 3 mm, l 3 5 1.9 mm, a 1 5 0.28 mm, b 5 5.2 mm, d 5 0.82 mm, g R3 5 0.3 mm u 1 5 0.22 mm, u 2 5 0.095 mm, h 5 7.5p, t 5 3.149 mm. The geometrical size of the simplified filter is 0.118k 0 3 0.184k 0 , where k 0 is the free space wavelength at the center frequency of lower passband. Furthermore, the performance of the filter does not decline with structure simplification, as shown in Figure 8, and Table 1.Due to processing inaccuracy, there are slight differences between the results of measurement and simulation. But overall, most of them are consistent, proving that the theoretical analysis of the design is correct. CONCLUSIONA new approach to design the dual-band SIW filter is proposed in this article. By modifying the CSRRs and loading them into the SIW with the CSRs together, the compact dual-band filters perform well. The interaction between the CSRRs and CSRs is discussed, indicating the potential on the combination of those two right/left-hand structures. After simulation and optimization, the proposed dual-band SIW filters are fabricated using normal PCB process. From the results of measurement, it can be seen that the proposed filters have good frequency selectivity, and excellent band rejection, which are consistent with the simulation results.ABSTRACT: This letter describes a size-independent effective permittivity of biological tissues, using microstrip ring resonator (MRR), to evaluate the moisture content more effectively. As permittivity is depends on material density, the optimum sample size where further size variations will not change the effective permittivity are identified. Using simulation and experimental results it is found that, a sample having thickness more than 9% of substrate height (t sub ) and width greater than 18.3% of guided wavelength (k g) shows size-independent effective permittivity. Both simulation and experimental results are in good agreement (within 3%). These findings allow more effective characterization of muscles according to their moisture content. V C 2016 Wiley Periodicals, Inc. Microwave Opt Technol Lett 58:4-9, 2016; View this article online at wileyonlinelibrary.com.

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Section: Analysis and Experimentationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Determination of size-independent effective permittivity of an overlay material using microstrip ring resonator

Jilani

Wen

Cheong

et al. 2015

Microw. Opt. Technol. Lett.

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“…To measure moisture in hevea rubber latex, a U-shaped antenna has been described [18]. A moisture sensor has been rendered based on the microstrip antenna which is operated on dual frequencies [19][20][21][22][23][24][25][26].…”

Section: Introductionmentioning

confidence: 99%

Microstrip Moisture Sensor Based on Microstrip Patch Antenna

Jain¹,

Mishra²,

Thakare³

et al. 2018

PIER M

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A miniaturized U-shape patch sensor (15 mm × 15 mm) was designed at dual resonating frequencies (f r) 5.2 GHz and 6.8 GHz. The proposed design printed on FR4 material with a thickness of 1.676 mm and relative permittivity 4.4. To simulate the performances of the proposed design, the CST Microwave Studio (CST MWS) was used. The reflection coefficient of U-shape patch sensor was measured. Basmati rice was investigated, and bulk density was increased with increase of moisture content, hence varied from 554.3 to 591 kg/m 3. It has the longest average rice length (L) 7.2 mm, average width (W) 1.61 mm, and L/W ratio 4.47. The percentage of moisture was varied from 10.71% to 21.87% calculated on a wet weight basis. The lowest mean relative error (MRE) determined between predicted moisture content (PMC) and actual moisture content (AMC) was 0.55% at dual frequencies.

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“…Further, while evaluating the physical properties it would be useful to measure the average permittivity of a material. Considering these aspects, recently, a highly sensitive microwave resonator sensor has been proposed to evaluate the moisture amount [ 14 ]. The ring resonator is based on the resonance mechanism, which offers not just high accuracy but also simple, cost-effective and fast measurements [ 15 ].…”

Section: Introductionmentioning

confidence: 99%

A Microwave Ring-Resonator Sensor for Non-Invasive Assessment of Meat Aging

Jilani

Wen

Cheong

et al. 2016

Sensors

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The assessment of moisture loss from meat during the aging period is a critical issue for the meat industry. In this article, a non-invasive microwave ring-resonator sensor is presented to evaluate the moisture content, or more precisely water holding capacity (WHC) of broiler meat over a four-week period. The developed sensor has shown significant changes in its resonance frequency and return loss due to reduction in WHC in the studied duration. The obtained results are also confirmed by physical measurements. Further, these results are evaluated using the Fricke model, which provides a good fit for electric circuit components in biological tissue. Significant changes were observed in membrane integrity, where the corresponding capacitance decreases 30% in the early aging (0D-7D) period. Similarly, the losses associated with intracellular and extracellular fluids exhibit changed up to 42% and 53%, respectively. Ultimately, empirical polynomial models are developed to predict the electrical component values for a better understanding of aging effects. The measured and calculated values are found to be in good agreement.

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An improved design of microwave biosensor for measurement of tissues moisture

Cited by 5 publications

References 10 publications

Determination of size-independent effective permittivity of an overlay material using microstrip ring resonator

Determination of size-independent effective permittivity of an overlay material using microstrip ring resonator

Microstrip Moisture Sensor Based on Microstrip Patch Antenna

A Microwave Ring-Resonator Sensor for Non-Invasive Assessment of Meat Aging

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