Planar Microstrip Ring Resonators for Microwave-Based Gas Sensing : Design Aspects and Initial Transducers for Humidity and Ammonia Sensing

Titelangaben

Bogner, Andreas ; Steiner, Carsten ; Walter, Stefanie ; Kita, Jaroslaw ; Hagen, Gunter ; Moos, Ralf:
Planar Microstrip Ring Resonators for Microwave-Based Gas Sensing : Design Aspects and Initial Transducers for Humidity and Ammonia Sensing.
In: Sensors. Bd. 17 (2017) Heft 10 . - 2422.
ISSN 1424-8220
DOI: https://doi.org/10.3390/s17102422

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Abstract

A planar microstrip ring resonator structure on alumina was developed using the commercial FEM software COMSOL. Design parameters were evaluated, eventually leading to an optimized design of a miniaturized microwave gas sensor. The sensor was covered with a zeolite film. The device was successfully operated at around 8.5 GHz at room temperature as a humidity sensor. In the next step, an additional planar heater will be included on the reverse side of the resonator structure to allow for testing of gas-sensitive materials under sensor conditions.