Long Range Wireless Interrogation of Passive Humidity Sensors using Van-Atta Cross-Polarization Effect and 3D Beam Scanning Analysis

Abstract : This paper reports for the first time a long-range interrogation (> 50 meters) of wireless and batteryless humidity sensors combining a Van-Atta retrodirective array and a 3D beam scanning using a 24GHz Frequency-Modulated Continuous-Wave radar. Van-Atta cross-polarization properties, as well as the use of dedicated statistical estimators and Synthetic Aperture Radar technique allow the long-range measurement of the relative humidity at a distance of 58 meters. A measurement sensitivity of 0.2dB to 0.4dB per %RH was measured as a linear variation of the proposed estimator with a standard error of ±0.005dB.
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Conference papers
International Microwawe Symposium (IMS), Jun 2017, Honolulu, United States. International Microwawe Symposium (IMS), 4p., 2017
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Dominique Henry, Jimmy Hester, Hervé Aubert, Patrick Pons, Manos Tentzeris. Long Range Wireless Interrogation of Passive Humidity Sensors using Van-Atta Cross-Polarization Effect and 3D Beam Scanning Analysis. International Microwawe Symposium (IMS), Jun 2017, Honolulu, United States. International Microwawe Symposium (IMS), 4p., 2017. 〈hal-01570718〉

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