Analytical Evaluation of a Coplanar Interdigitated Sensor Capacitance for 1-N-1 Multilayered Structure

Khan, Anwar Ulla; Khan, Mohammad Ehtisham; Hasan, Mashhood; Alhazmi, Waleed; Zakri, Waleed

doi:10.1109/tim.2023.3235458

Cited by 6 publications

(6 citation statements)

References 31 publications

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“…Applying the above Equation (4) calculates the CID sensor's total capacitance. The computation of C Ipα (h i ) and C Epα (h i ), was already proposed in our previous work (refer [22] for details) and is summarized in Table 1.…”

Section: Partial Parallel Capacitance (Ppc)mentioning

confidence: 99%

“…The capacitances, previously labeled C Iα and C Eα , are now measured with the aid of all of the various layers above the plane of the electrode in series and can be computed in terms of the GCs C Isα and C Esα (refer Figure 5). The sum of all n layers' contributions should now be calculated as follows [22]:…”

Section: Partial Series Capacitance (Psc)mentioning

confidence: 99%

“…To date, several exemplary models have been documented for CID electrodes with multilayer structures [14][15][16][17][18][19][20][21][22]. Alley [14] proposed an estimated model for a CID capacitor utilizing a loss-less integrated microstrip line principle.…”

Section: Introductionmentioning

confidence: 99%

“…The applicability of all proposed models is limited to the 1-1-1 CID pattern, which consists of one NE positioned between two PEs in the context of the CID sensor. Our prior work [22] proposed a model utilizing CM transformations and PC techniques to derive expressions for estimating sensor capacitances for all feasible configurations of CID sensors (1-N-1) in multilayered structures. This model incorporates considerations for the impact of fringing field capacitance resulting from the external electrodes of the CID capacitive sensor.…”

Section: Introductionmentioning

confidence: 99%

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Expansion of the Analytical Modeling of Capacitance for 1-N-1 Multilayered CID Structures with Monotonically Increasing/Decreasing Permittivity

Khan

2023

Sensors

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Capacitive sensors that utilize the Coplanar Interdigitated (CID) electrode structure are widely employed in various technical and analytical domains, such as healthcare, infectious disease management, pharmaceuticals, metrology, and environmental monitoring. The present exigency for lab-on-a-chip contrivances and the requisite for the miniaturization of sensors have led to the widespread adoption of CID sensors featuring multiple dielectric layers (DLs), either in the form of substrates or superstrates. Previously, we derived an analytical model for the capacitance of CID capacitive sensors with four distinct 1-N-1 patterns (namely, 1-1-1, 1-3-1, 1-5-1, and 1-11-1) using partial capacitance (PC) and conformal mapping (CM) techniques. The aforementioned model has been employed in various applications wherein the permittivity of successive layers exhibits a monotonic decrease as one moves away from the electrode plane, resulting in highly satisfactory outcomes. Nevertheless, the PC technique is inadequate for structures with multiple layers where the permittivity exhibits a monotonic increase as the distance from the electrodes increases. Given these circumstances, it is necessary to adapt the initial PC method to incorporate these novel configurations. In this work, we have discussed a new approach, splitting the concept of PC into partial parallel capacitance (PPC) and partial serial capacitance (PSC), where new CM transformations are proposed for the latter case. Thus, the present study proposes a novel methodology to expand upon our prior analytical framework, which aims to incorporate scenarios where the permittivity experiences a reduction across successive layers. The outcomes are juxtaposed with the finite element simulation and analytical findings.

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Section: Partial Parallel Capacitance (Ppc)mentioning

confidence: 99%

Section: Partial Series Capacitance (Psc)mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Expansion of the Analytical Modeling of Capacitance for 1-N-1 Multilayered CID Structures with Monotonically Increasing/Decreasing Permittivity

Khan

2023

Sensors

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“…The CI sensor belongs to a category of coplanar capacitive sensors, and the progress in deriving theoretical models for coplanar capacitive sensors is valuable in developing the theoretical model of the CI sensor. In terms of the theoretical model of coplanar capacitive sensors, Khan et al (2023) derived the theoretical model of coplanar cross-finger capacitive sensors using conformal mapping techniques, and this theoretical model can be used for any number of layers (with variable permittivity and thickness), widths of the finger-like objects and gaps between the finger-like objects. Ge et al (2022) proposed a general theoretical model of a hybrid sensory structure with multi-information perception capability, and this model combines the capacitance and resistive mechanisms for proximity and wide-range contact force detection, respectively.…”

Section: Introductionmentioning

confidence: 99%

The semi-analytical model of capacitive imaging (CI) sensors based on the renormalization group method

Li,

Han,

Zhao

et al. 2024

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Purpose This study aims to design and validate a theoretical model for capacitive imaging (CI) sensors that incorporates the interelectrode shielding and surrounding shielding electrodes. Through experimental verification, the effectiveness of the theoretical model in evaluating CI sensors equipped with shielding electrodes has been demonstrated. Design/methodology/approach The study begins by incorporating the interelectrode shielding and surrounding shielding electrodes of CI sensors into the theoretical model. A method for deriving the semianalytical model is proposed, using the renormalization group method and physical model. Based on random geometric parameters of CI sensors, capacitance values are calculated using both simulation models and theoretical models. Three different types of CI sensors with varying geometric parameters are designed and manufactured for experimental testing. Findings The study’s results indicate that the errors of the semianalytical model for the CI sensor are predominantly below 5%, with all errors falling below 10%. This suggests that the semianalytical model, derived using the renormalization group method, effectively evaluates CI sensors equipped with shielding electrodes. The experimental results demonstrate the efficacy of the theoretical model in accurately predicting the capacitance values of the CI sensors. Originality/value The theoretical model of CI sensors is described by incorporating the interelectrode shielding and surrounding shielding electrodes into the model. This comprehensive approach allows for a more accurate evaluation of the detecting capability of CI sensors, as well as optimization of their performance.

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Recent progress and applications of cellulose and its derivatives-based humidity sensors: A review

Huang

Gao

et al. 2023

Carbohydrate Polymers

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Analytical Evaluation of a Coplanar Interdigitated Sensor Capacitance for 1-N-1 Multilayered Structure

Cited by 6 publications

References 31 publications

Expansion of the Analytical Modeling of Capacitance for 1-N-1 Multilayered CID Structures with Monotonically Increasing/Decreasing Permittivity

Expansion of the Analytical Modeling of Capacitance for 1-N-1 Multilayered CID Structures with Monotonically Increasing/Decreasing Permittivity

The semi-analytical model of capacitive imaging (CI) sensors based on the renormalization group method

Recent progress and applications of cellulose and its derivatives-based humidity sensors: A review

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