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Article Dans Une Revue Sensors and Actuators B: Chemical Année : 2000

Microwave sensors: a new sensing principle. Application to humidity detection

Résumé

We are presenting here a new approach to gas sensor, using the electromagnetic (e.m.) properties variation of some sensitive materials in the presence of gas at ultrahigh frequencies (ca. 1 GHz). The chemical sensor basically consists of a microwave resonator to which a sensitive coating is added. The e.m perturbation can be seen through a frequency variation measurement when the sensor serves as feedback element in an oscillator chain. After the development of a narrow-band-pass filter, a permittivity variation study is done, thanks to an e.m simulator HP-MDS. Then a humidity sensor is designed and tested. A good sensitivity as well as a great reversibility are obtained.
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Dates et versions

hal-01487672 , version 1 (12-03-2017)

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  • HAL Id : hal-01487672 , version 1

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Catherine Bernou, Dominique Rebière, Jacques Pistré. Microwave sensors: a new sensing principle. Application to humidity detection. Sensors and Actuators B: Chemical, 2000, 68, pp.88-93. ⟨hal-01487672⟩
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