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A Compact Breath Gas Sensor System Based on Terahertz/millimeter-wave Gas Spectroscopy by Nick Rothbart; Klaus Schmalz; Rembert Koczulla; Heinz-Wilhelm Hübers is a Engineering article available to read on EtoBox.

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## Abstract We demonstrate a full-cycle breath gas sensor system based on terahertz/millimeter-wave gas spectroscopy. The sensor consists of a transmitter and receiver working around 250 GHz based on SiGe BiCMOS technology. Typical detection thresholds are in the ppm range depending on the respective molecule. The data analysis provides partial pressures of the investigated molecules by fitting of spectra which are measured by wavelength modulation. Beside the spectroscopic measurement and the data analysis, a full cycle of breath analysis includes the sampling and the conditioning of the sample tubes. The full cycle takes about 35 min per sample in average. As the system is compact and easy to operate, it allows for on-site analysis of breath samples in medical laboratories or hospitals.

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Author

Nick Rothbart; Klaus Schmalz; Rembert Koczulla; Heinz-Wilhelm Hübers

Publisher

Walter de Gruyter GmbH

Published

2022

Language

EN

Field

Engineering (Physical Sciences)