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Article

TM02 Quarter-Mode Substrate-Integrated Waveguide Resonator for Dual Detection of Chemicals

School of Electrical and Electronics Engineering, College of Engineering, Chung-Ang University, 221, Heukseok-Dong, Dongjak-Gu, Seoul 156-756, Korea
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Author to whom correspondence should be addressed.
Sensors 2018, 18(6), 1964; https://doi.org/10.3390/s18061964
Received: 19 May 2018 / Revised: 14 June 2018 / Accepted: 16 June 2018 / Published: 18 June 2018
(This article belongs to the Special Issue RF Technology for Sensor Applications)
The detection of multiple fluids using a single chip has been attracting attention recently. A TM02 quarter-mode substrate-integrated waveguide resonator designed at 5.81 GHz on RT/duroid 6010LM with a return loss of 13 dB and an unloaded quality factor of Q ≈ 13 generates two distinct strong electric fields that can be manipulated to simultaneously detect two chemicals. Two asymmetric channels engraved in a polydimethylsiloxane sheet are loaded with analyte to produce a unique resonance frequency in each case, regardless of the dielectric constants of the liquids. Keeping in view the nature of lossy liquids such as ethanol, the initial structure and channels are optimized to ensure a reasonable return loss even in the case of loading lossy liquids. After loading the empty channels, Q is evaluated as 43. Ethanol (E) and deionized water (DI) are simultaneously loaded to demonstrate the detection of all possible combinations: [Air, Air], [E, DI], [DI, E], [E, E], and [DI, DI]. The proposed structure is miniaturized while exhibiting a performance comparable to that of existing multichannel microwave chemical sensors. View Full-Text
Keywords: dual detection; TM02-mode quarter-mode substrate-integrated waveguide; microwave sensor; microfluidic channel dual detection; TM02-mode quarter-mode substrate-integrated waveguide; microwave sensor; microfluidic channel
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MDPI and ACS Style

Salim, A.; Lim, S. TM02 Quarter-Mode Substrate-Integrated Waveguide Resonator for Dual Detection of Chemicals. Sensors 2018, 18, 1964. https://doi.org/10.3390/s18061964

AMA Style

Salim A, Lim S. TM02 Quarter-Mode Substrate-Integrated Waveguide Resonator for Dual Detection of Chemicals. Sensors. 2018; 18(6):1964. https://doi.org/10.3390/s18061964

Chicago/Turabian Style

Salim, Ahmed, and Sungjoon Lim. 2018. "TM02 Quarter-Mode Substrate-Integrated Waveguide Resonator for Dual Detection of Chemicals" Sensors 18, no. 6: 1964. https://doi.org/10.3390/s18061964

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