A metamaterials-loaded quarter mode SIW microfluidic sensor for microliter liquid characterization

Jing Cai, Yong Jin Zhou and Xin Mi Yang

Journal of Electromagnetic Waves and Applications, 2019, vol. 33, issue 3, 261-271

Abstract: In this paper, a two concentric complementary split-ring resonators (CSRRs) loaded quarter mode substrate integrated waveguide (QMSIW) is proposed as a compact microfluidic chemical sensor for liquid characterization, demonstrated by the measurement of distilled (DI) water and ethanol liquid mixtures. The proposed sensor can detect the liquid concentration from the resonance frequency shift caused by the liquid sample flowing inside the microfluidic channel engraved on polydimethylsiloxane (PDMS). Its electrical size is only 0.25λg *0.25λg. The simulated resonant frequency shifts between DI water and 100% ethanol is 1196 MHz (from 2.620 GHz to 3.816 GHz), while less than 6 µL samples are used. The experimental results have validated the possibility of the application of the proposed microfluidic structure as a chemical sensor.

Date: 2019
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DOI: 10.1080/09205071.2018.1543058

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