TY - GEN
T1 - A metamaterial-inspired miniaturized wide-band microwave interferometry sensor for liquid chemical detection
AU - Saghati, Ali Pourghorban
AU - Batra, Jaskirat Singh
AU - Kameoka, Jun
AU - Entesari, Kamran
N1 - Publisher Copyright:
© 2016 IEEE.
PY - 2016/8/9
Y1 - 2016/8/9
N2 - This paper presents a miniature wide-band interferometry sensor for dielectric spectroscopy and detection of liquid chemicals based on utilizing two composite right/left-handed (CRLH) transmission lines (TLs) in a zero-IF mixing configuration. The equivalent series capacitance of the CRLH TLs, constructed by using microstrip interdigital capacitors, is loaded with microfluidic channels, and exposed to the material under test (MUT) to act as the sensing element. Due to the nonlinear dispersion relation of the artificial TLs with respect to the sensing capacitor, higher sensitivity over a frequency band as wide as 4-8 GHz is achieved, compared to the previously-reported resonator- or capacitor-based sensors. The final fabricated system prototype is 4 cm×8 cm. Moreover, a calibration method is presented based on measurement results, which shows an rms error less than ∼1.5% for liquid-chemical permittivity detection. To the best of author's knowledge, this is the first disclosure of wide-band and highly-sensitive microwave interferometry sensor suitable for portable lab-on-board applications.
AB - This paper presents a miniature wide-band interferometry sensor for dielectric spectroscopy and detection of liquid chemicals based on utilizing two composite right/left-handed (CRLH) transmission lines (TLs) in a zero-IF mixing configuration. The equivalent series capacitance of the CRLH TLs, constructed by using microstrip interdigital capacitors, is loaded with microfluidic channels, and exposed to the material under test (MUT) to act as the sensing element. Due to the nonlinear dispersion relation of the artificial TLs with respect to the sensing capacitor, higher sensitivity over a frequency band as wide as 4-8 GHz is achieved, compared to the previously-reported resonator- or capacitor-based sensors. The final fabricated system prototype is 4 cm×8 cm. Moreover, a calibration method is presented based on measurement results, which shows an rms error less than ∼1.5% for liquid-chemical permittivity detection. To the best of author's knowledge, this is the first disclosure of wide-band and highly-sensitive microwave interferometry sensor suitable for portable lab-on-board applications.
KW - Composite right/left-handed transmission line
KW - interferometry sensor
KW - permittivity measurement
UR - http://www.scopus.com/inward/record.url?scp=84984940266&partnerID=8YFLogxK
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U2 - 10.1109/MWSYM.2016.7540424
DO - 10.1109/MWSYM.2016.7540424
M3 - Conference contribution
AN - SCOPUS:84984940266
T3 - IEEE MTT-S International Microwave Symposium Digest
BT - 2016 IEEE MTT-S International Microwave Symposium, IMS 2016
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 2016 IEEE MTT-S International Microwave Symposium, IMS 2016
Y2 - 22 May 2016 through 27 May 2016
ER -