TY - JOUR
T1 - Differential microfluidic sensors based on dumbbell-shaped defect ground structures in microstrip technology: Analysis, optimization, and applications
AU - Vélez, Paris
AU - Muñoz-Enano, Jonathan
AU - Gil, Marta
AU - Mata-Contreras, Javier
AU - Martín, Ferran
PY - 2019/7/2
Y1 - 2019/7/2
N2 - © 2019 by the authors. Licensee MDPI, Basel, Switzerland. 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.
AB - © 2019 by the authors. Licensee MDPI, Basel, Switzerland. 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.
KW - Defect ground structure (DGS)
KW - Dielectric characterization
KW - Differential sensors
KW - Fluidic sensors
KW - Microstrip technology
KW - Microwave sensors
U2 - https://doi.org/10.3390/s19143189
DO - https://doi.org/10.3390/s19143189
M3 - Article
C2 - 31331078
VL - 19
JO - Sensors
JF - Sensors
SN - 1424-3210
M1 - 3189
ER -