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The feasibility of the remote measurement of gas detection from an RF gas sensor has been experimentally investigated. It consists of a Frequency-Modulated Continuous-Wave (FMCW) RADAR interrogation of an antenna loaded by the passive sensor. The frequency band of the RADAR [28.8-31GHz] allows the detection of the resonant frequencies of Whispering Gallery Modes that are sensitive to gas concentration...
This work describes a novel concept of gas sensor based on RF-transduction technique. The sensor uses a millimeter-wave planar dielectric resonator operating with Whispering-Gallery-Modes. The dielectric resonator incorporates a sensitive material (TiO2 or SnO2) and two coplanar waveguides coupled to its input and output. In presence of gas, the dielectric permittivity of the resonator is modified...
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