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A Low-Cost In-Situ Monitoring System for the Measurement of Losses in Resonant Cavities

Title data

Peter, Ronny ; Lutz, Jannik ; Fischerauer, Gerhard:
A Low-Cost In-Situ Monitoring System for the Measurement of Losses in Resonant Cavities.
In: IEEE Transactions on Instrumentation and Measurement. Vol. 73 (2024) . - 6006210.
ISSN 1557-9662
DOI: https://doi.org/10.1109/TIM.2024.3394499

Official URL: Volltext

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Project financing: Bundesministerium für Wirtschaft und Technologie

Abstract in another language

Resonant cavities can be used as tools for the measurement of material parameters. Usually a material sample is placed inside and a network analyzer is connected to the cavity and measures their S-parameters from which the resonance parameters are extracted. The cost of such laboratory equipment is high (usually multiple tens of thousand dollars) and its shape factor is large, which limits its usefulness for in-situ applications. And especially if one is only interested in the electrical losses of the material under test, the measurement of S-parameters is superfluous. We will show that it is sufficient to determine the wave attenuation by measuring the integral power loss over a broad bandwidth. Only a low-cost noise generator and a power detector diode is needed for this method. With our inexpensive setup (below $10), we were able to determine e.g. the dielectric losses of water at microwave frequency in close agreement with the literature.

Further data

Item Type: Article in a journal
Refereed: Yes
Keywords: Cavity; loss measurement; monitoring, noise source; nondestructive testing; RF generator
Institutions of the University: Faculties > Faculty of Engineering Science > Chair Measurement and Control Technology > Chair Measurement and Control Technology - Univ.-Prof. Dr.-Ing. Gerhard Fischerauer
Faculties
Faculties > Faculty of Engineering Science
Faculties > Faculty of Engineering Science > Chair Measurement and Control Technology
Result of work at the UBT: Yes
DDC Subjects: 600 Technology, medicine, applied sciences > 620 Engineering
Date Deposited: 13 May 2024 09:09
Last Modified: 13 May 2024 09:09
URI: https://eref.uni-bayreuth.de/id/eprint/89461