AI Article Synopsis
- A microstrip defect ground structure (DGS) using dumbbell-shaped slots serves as a differential sensor sensitive to asymmetries in the line pair, which are affected by the surrounding dielectric materials.
- The sensor can characterize solids and liquids by measuring changes in the cross-mode transmission coefficient, focusing on complex permittivity variations.
- Additionally, integrating fluidic channels enhances its utility for characterizing liquids, particularly in determining solute concentrations in dilute solutions, with a sensitivity analysis aiding in optimal sensor design.
Article Abstract
A microstrip defect ground structure (DGS) based on a pair of dumbbell-shaped slots is used for sensing. The device is a differential sensor consisting of a pair of mirrored lines loaded with a dumbbell-shaped DGS, and the output variable is the cross-mode transmission coefficient. Such a variable is very sensitive to asymmetries in the line pair, e.g., caused by an asymmetric dielectric load in the dumbbell-shaped DGSs. Therefore, the sensor is of special interest for the dielectric characterization of solids and liquids, or for the measurement of variables related to complex permittivity changes. It is shown in this work that by adding fluidic channels on top of the dumbbell-shaped DGSs, the device is useful for liquid characterization, particularly for the measurement of solute concentration in very diluted solutions. A sensitivity analysis useful for sensor design is carried out in this paper.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6679327 | PMC |
| http://dx.doi.org/10.3390/s19143189 | DOI Listing |
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