Preprint Article Version 1 This version is not peer-reviewed

Monolithic Microwave-Microfluidic Sensors Made with Low Temperature Co-Fired Ceramics (LTCC) Technology

Version 1 : Received: 2 January 2019 / Approved: 4 January 2019 / Online: 4 January 2019 (09:00:27 CET)

A peer-reviewed article of this Preprint also exists.

Malecha, K.; Jasińska, L.; Grytsko, A.; Drzozga, K.; Słobodzian, P.; Cabaj, J. Monolithic Microwave-Microfluidic Sensors Made with Low Temperature Co-Fired Ceramic (LTCC) Technology. Sensors 2019, 19, 577. Malecha, K.; Jasińska, L.; Grytsko, A.; Drzozga, K.; Słobodzian, P.; Cabaj, J. Monolithic Microwave-Microfluidic Sensors Made with Low Temperature Co-Fired Ceramic (LTCC) Technology. Sensors 2019, 19, 577.

Journal reference: Sensors 2019, 19, 577
DOI: 10.3390/s19030577

Abstract

This paper compares two types of microfluidic sensors that are designed for operation in ISM bands at microwave frequencies of 2.45 GHz and 5.8 GHz. In the case of the first sensor, the principle of operation is based on the resonance phenomenon in a microwave circuit filled with a test sample. The second sensor is based on the interferometric principle and makes use of the superposition of two coherent microwave signals, where only one of them goes through a test sample. Both sensors are monolithic structures fabricated using low temperature co-fired ceramics (LTCC). The LTCC-based microwave-microfluidic sensor properties are examined and compared by measuring their responses for various concentrations of two types of test fluids: one is a mixture of water/ethanol, and the other is dopamine dissolved in a buffer solution. The experiments show a linear response for the LTCC-based microwave-microfluidic sensors as a function of the concentration of the components in both test fluids.

Subject Areas

microwaves, microfluidic, sensor, LTCC

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