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Contribution à la conception de radars géologiques impulsionnels fonctionnant dans un milieu complexe

Abstract : This work presents the design and the realization of an antenna Ultra Wide Band, of low dimensions, for a GPR application working in a complex environment in a frequency band between 70 MHz and 1GHz. This study was registered within the framework of a European project mentioned NeTTUN (New Technologies for Tunnelling and Underground works) who aims at improving the security of the tunnel driving. In this project, the wanted work was to realize a GPR system containing an integrable antenna ULB on a TBM cutter head while working in low frequencies.To realize this antenna by answering the various constraints of dimensions, integration and radiation, a study of antenna insertion in a dielectric material was realized. So analyses were led for time on the subsoil nature encountered, of the compromise between low frequencies and minimal dimensions and especially the integrability of the antenna in a cavity. This study allowed to realize an innovative antenna named Khorn. The Khorn is an association of the K antenna and the Horn antenna. To estimate the performance of the Khorn in its environment, the footprint and the radar range were studied. Measures of validation of the realized prototypes were also made.
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Submitted on : Sunday, February 12, 2017 - 1:02:34 AM
Last modification on : Thursday, May 17, 2018 - 3:55:42 AM
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  • HAL Id : tel-01465375, version 1



Mouhamed Sow. Contribution à la conception de radars géologiques impulsionnels fonctionnant dans un milieu complexe. Electronique. Université de Limoges, 2015. Français. ⟨NNT : 2015LIMO0011⟩. ⟨tel-01465375⟩



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