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Système de détection embarqué ULB millimétrique pour la perception de l'environnement

Abstract : With the current context of security challenges, small objects detection is becoming a major issue in the fight against malicious acts. However, developments in millimeter-band technologies and the potential of these bands, particularly around 60 GHz, can facilitate the design of increasingly efficient systems to meet these challenges. This thesis is part of this context to propose an ultra-wideband (UWB) millimeter-wave detection system for short-range applications.After a detailed state-of-the-art of the fundamentals of detection, we present a validation of the radar cross-section (RCS) estimation by simulations with HFSS software and by measurements in anechoic chamber. These two studies allowed us to identify the essential elements for system analysis and the critical parameters for the detection of canonical objects such as cylinders and plates.Once the system analysis was identified, we proposed a multi-band detection approach based on monostatic radar to improve the detection coverage of the systems, but also and especially to overcome the limitation of objects detection according to their orientation in relation to the antenna boresight. We also proposed a simple architecture (transceiver) that could be associated with the detection principle. The system design allowed us to identify low noise amplifiers (LNAs) as critical elements of the receiver and thus establish their specifications to achieve the targeted performances.A comparison of IHP's SG13S and OMMIC's D007IH technologies is conducted in the last part of this work. The choice of technology is justified and the design of LNAs under ADS Keysight is detailed. A simulation of the entire system based on the performance of the designed LNAs and RCS simulations is presented to illustrate the implementation of detection. Finally, detection performances are evaluated for cylindrical targets and the contributions of the proposed system are illustrated in comparison with conventional single-band detection
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Submitted on : Monday, December 9, 2019 - 1:45:07 PM
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  • HAL Id : tel-02400120, version 1

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Pape Sanoussy Diao. Système de détection embarqué ULB millimétrique pour la perception de l'environnement. Traitement du signal et de l'image [eess.SP]. Université Paris-Est, 2019. Français. ⟨NNT : 2019PESC2005⟩. ⟨tel-02400120⟩

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