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Sensors 2017, 17(12), 2713; doi:10.3390/s17122713

A Microwave Microfluidic Sensor Based on a Dual-Mode Resonator for Dual-Sensing Applications

BioSense Institute—Research Institute for Information Technologies in Biosystems, Novi Sad 21000, Serbia
Author to whom correspondence should be addressed.
Received: 19 September 2017 / Revised: 16 November 2017 / Accepted: 21 November 2017 / Published: 24 November 2017
(This article belongs to the Special Issue Microfluidic Sensors)
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In this paper, we propose a novel microwave microfluidic sensor with dual-sensing capability. The sensor is based on a dual-mode resonator that consists of a folded microstrip line loaded with interdigital lines and a stub at the plane of symmetry. Due to the specific configuration, the resonator exhibits two entirely independent resonant modes, which allows simultaneous sensing of two fluids using a resonance shift method. The sensor is designed in a multilayer configuration with the proposed resonator and two separated microfluidic channels—one intertwined with the interdigital lines and the other positioned below the stub. The circuit has been fabricated using low-temperature co-fired ceramics technology and its performance was verified through the measurement of its responses for different fluids in the microfluidic channels. The results confirm the dual-sensing capability with zero mutual influence as well as good overall performance. Besides an excellent potential for dual-sensing applications, the proposed sensor is a good candidate for application in mixing fluids and cell counting. View Full-Text
Keywords: microwave sensor; dual-mode resonator; microstrip; microfluidics; low-temperature co-fired ceramics microwave sensor; dual-mode resonator; microstrip; microfluidics; low-temperature co-fired ceramics

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Jankovic, N.; Radonic, V. A Microwave Microfluidic Sensor Based on a Dual-Mode Resonator for Dual-Sensing Applications. Sensors 2017, 17, 2713.

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