Skip to Main content Skip to Navigation
Theses

Conception et simulation à 115,3 GHz d'un microcapteur composé d'une antenne en V couplée à un filtre sélectif à bande interdite photonique chargé par un bolomètre. Potentialités pour la détection de COV dans le THz

Abstract : Volatile Organic Compounds (VOCs) in the air are known to have a detrimental effect on human healthand the environment. Standards for air quality have been defined, which require efficient chemical sensors allowingreal time monitoring together with a high sensitivity. This work reports on a possible microsystem using nondispersiveabsorption spectroscopy extended in the THz range, as proposed earlier by the electronic team of theGREYC UMR 6072 lab. It consists of a V-antenna coupled with a Photonic BandGap (PBG) selective filterloaded with a microbolometer.This thesis mainly deals with the study of the various losses in such a system, in a lower frequency range(around 115.3 GHz matching an absorption line of carbon monoxide (CO)). A prototype has been designed to obtaina small detecting time (1 s) of that molecule for a minimum concentration of 10 mg/m3 (official standard). Acoherent light (laser – 10 mW) through a 1 m long gas cell detected by the proposed system should reach thatlevel, with a quality factor Q higher than 100.The design was made using the classical theory on quarter-wave length line, and using 3D simulationtools (finite elements). Taking into account losses, a quality factor Q = 290 was obtained together with a detectingtime of 13 ms. The limitations of this prototype are finally analyzed. Improvements and topology modificationsare discussed in view of possible implementation in the THz domain.
Document type :
Theses
Complete list of metadatas

Cited literature [55 references]  Display  Hide  Download

https://hal-normandie-univ.archives-ouvertes.fr/tel-02321593
Contributor : Jean-Paterne Kouadio <>
Submitted on : Monday, October 21, 2019 - 12:55:23 PM
Last modification on : Thursday, October 8, 2020 - 5:36:02 PM
Long-term archiving on: : Wednesday, January 22, 2020 - 2:20:04 PM

File

THESE_JP_KOUADIO.pdf
Files produced by the author(s)

Identifiers

  • HAL Id : tel-02321593, version 1

Citation

Jean-Paterne Kouadio. Conception et simulation à 115,3 GHz d'un microcapteur composé d'une antenne en V couplée à un filtre sélectif à bande interdite photonique chargé par un bolomètre. Potentialités pour la détection de COV dans le THz. Electronique. Université de Caen, 2010. Français. ⟨tel-02321593⟩

Share

Metrics

Record views

69

Files downloads

29