TY - JOUR
T1 - Transmission Lines Loaded With Pairs of Stepped Impedance Resonators: Modeling and Application to Differential Permittivity Measurements
AU - Naqui, Jordi
AU - Damm, Christian
AU - Wiens, Alex
AU - Jakoby, Rolf
AU - Su, Lijuan
AU - Mata-Contreras, Javier
AU - Martín, Ferran
PY - 2016/11/1
Y1 - 2016/11/1
N2 - © 2016 IEEE. Differential techniques are widely used in communication and sensor systems, as these techniques have been shown to improve the performance. This paper shows how differential sensing of permittivity can be conducted in a simple way. For that purpose, a microstrip line loaded with a pair of stepped-impedance resonators is used in two different resonator connections: parallel and cascade. Each resonator is individually perturbed dielectrically so that: 1) when the two individual permittivities are identical, the structure exhibits a single resonance frequency and 2) when the permittivities are different, resonance frequency splitting occurs, giving rise to two resonances (all these resonances are seen in the form of transmission zeroes). The two sensing approaches are successfully validated through electromagnetic simulations and experiments. By virtue of a differential measurement, robustness against changing ambient factors that may produce sensor miscalibration is expected.
AB - © 2016 IEEE. Differential techniques are widely used in communication and sensor systems, as these techniques have been shown to improve the performance. This paper shows how differential sensing of permittivity can be conducted in a simple way. For that purpose, a microstrip line loaded with a pair of stepped-impedance resonators is used in two different resonator connections: parallel and cascade. Each resonator is individually perturbed dielectrically so that: 1) when the two individual permittivities are identical, the structure exhibits a single resonance frequency and 2) when the permittivities are different, resonance frequency splitting occurs, giving rise to two resonances (all these resonances are seen in the form of transmission zeroes). The two sensing approaches are successfully validated through electromagnetic simulations and experiments. By virtue of a differential measurement, robustness against changing ambient factors that may produce sensor miscalibration is expected.
KW - Differential measurement
KW - dual-mode resonator
KW - microstrip
KW - microwave sensor
KW - stepped-impedance resonator (SIR)
U2 - https://doi.org/10.1109/TMTT.2016.2610423
DO - https://doi.org/10.1109/TMTT.2016.2610423
M3 - Article
VL - 64
SP - 3864
EP - 3877
JO - IEEE Transactions on Microwave Theory and Techniques
JF - IEEE Transactions on Microwave Theory and Techniques
SN - 0018-9480
IS - 11
M1 - 7582527
ER -