TY - JOUR
T1 - Lorentz Reflect-Phase Detector for Moisture and Dielectric Sensing
AU - Siddiqui, Omar F.
AU - Ramzan, Rashad
AU - Amin, Muhammad
AU - Omar, Muhammad
AU - Bastaki, Nabil
N1 - Funding Information:
Manuscript received June 1, 2018; accepted July 8, 2018. Date of publication September 10, 2018; date of current version October 23, 2018. The work of R. Ramzan, M. Omar, and N. Bastaki was supported by UAE University, Alain-1551, through the National Water Center (NWC) to commence fabrication and measurements under Grant 31R111. The associate editor coordinating the review of this paper and approving it for publication was Prof. Pai-Yen Chen. (Corresponding author: Rashad Ramzan.) O. F. Siddiqui and M. Amin are with the College of Engineering, Taibah University, Medina 41477, Saudi Arabia (e-mail: osiddiqui@taibahu.edu.sa).
Funding Information:
The work of R. Ramzan, M. Omar, and N. Bastaki was supported by UAE University, Alain-1551, through the National Water Center (NWC) to commence fabrication and measurements under Grant 31R111. The authors would also like to acknowledge the generous support from Rogers Corporation for the provision of PCB substrates.
Publisher Copyright:
© 2018 IEEE.
PY - 2018/11/15
Y1 - 2018/11/15
N2 - We experimentally investigate a new class of resonant dielectric sensors that are based on reflectance phase measurement in the Lorentzian dispersion regime. The Lorentzian dispersion, also known as anomalous dispersion, is characterized by a strong wave absorption accompanied by a double reversal of the phase (flip-flop phase). Since the Kramer-Kronig relation holds, a phase-slope measurement is enough to completely characterize a dielectric material at in the narrowband microwave spectrum. Due to strong dispersion, the Lorentz sensors are noise immune and are less affected by external circuit changes. Therefore, they can be potentially applied in hostile environments such as high temperature furnaces. The proposed detection method is inspired from the optical measurement technique known as spectroscopic ellipsometry. We apply the anomalous phase detection to estimate dielectric and moisture changes.
AB - We experimentally investigate a new class of resonant dielectric sensors that are based on reflectance phase measurement in the Lorentzian dispersion regime. The Lorentzian dispersion, also known as anomalous dispersion, is characterized by a strong wave absorption accompanied by a double reversal of the phase (flip-flop phase). Since the Kramer-Kronig relation holds, a phase-slope measurement is enough to completely characterize a dielectric material at in the narrowband microwave spectrum. Due to strong dispersion, the Lorentz sensors are noise immune and are less affected by external circuit changes. Therefore, they can be potentially applied in hostile environments such as high temperature furnaces. The proposed detection method is inspired from the optical measurement technique known as spectroscopic ellipsometry. We apply the anomalous phase detection to estimate dielectric and moisture changes.
KW - Lorentzian dispersion
KW - anomalous dispersion
KW - dielectric sensing
KW - microstrip resonators
KW - noise immunity
KW - resonant sensors
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U2 - 10.1109/JSEN.2018.2869401
DO - 10.1109/JSEN.2018.2869401
M3 - Article
AN - SCOPUS:85053105090
SN - 1530-437X
VL - 18
SP - 9236
EP - 9242
JO - IEEE Sensors Journal
JF - IEEE Sensors Journal
IS - 22
M1 - 8458134
ER -