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Last name: NSENGIYUMVA
First name: Florence
Encadrée par Christian Pichot, Claire Migliaccio, Iannis Aliféris.
Encadrée par Christian Pichot et Claire Migliaccio , Armin Zeitler
Millimeter-wave radar systems in W-band (75-110 GHz) are booming, due to advances in integrated circuits, allowing the fabrication of low-cost and high-resolution compact systems, thanks to the short wavelength. First, these systems were used for detecting and localizing purposes, with the aim of identification. Thus, imaging radar systems have...
We present an efficient approch for reconstructing images of small objects and Foreign Objects Debris (FODs) from scattered field synthetic data and measurements in W-band (75-110 GHZ), taking advantages of spatial and polarization diversities, and process them with either qualitative or quantitative inverse methods. The target application is...
We present an efficient approach to reconstruct images of small objects and Foreign Object Debris (FODs) from scattered field synthetic data and measurements in W-band (75-110 GHz), taking advantages of spatial and polarization diversities, and processed with either qualitative or quantitative inverse methods. The target ...
International audience
Nous présentons des reconstructions quantitatives tomographiques (profil de permittivité et de conductivité) à partir des données simulées et mesurées pour une application de détection de FOD en bande W.Nous utilisons tout d'abord un algorithme d'imagerie qualitative pour localiser la cible afin de déterminer le domaine d'investigation. Puis,...
We present an efficient approach to reconstruct an image of a small object from the scattered fields measured at 90 GHz, taking advantages of spatial and polarization diversities, and processed with a robust real-time method. The target application is Foreign Object Debris (FODs) detection for airport runways. Most existing systems are...
We present an efficient approch for reconstructing images of small objects and Foreign Objects Debris (FODs) from scattered field synthetic data and measurements in W-band (75-110 GHZ), taking advantages of spatial and polarization diversities, and process them with either qualitative or quantitative inverse methods. The target application is...
We present an efficient approach to reconstruct an image of a small object from the scattered fields measured at 90 GHz, taking advantages of spatial and polarization diversities, and processed with a robust real-time method. The target application is Foreign Object Debris (FODs) detection for airport runways. Most existing systems are...
National audience
In this paper, we present the results of image reconstructions of foreign object debris (FOD) based on 2D algorithms in the W-band (75-110 GHz). To test the feasibility of using 2D reconstruction algorithms, we first studied the relevance of two-dimensional assumption in the working frequency band for different typical debris. Thanks to the...
For sake of simplicity and execution speed, many imaging algorithms are based on two-dimensional approaches. We present a study on the relevance and validity domain of two-dimensional approaches to detect debris on airport runways in W-band (75-110 GHz), taking into account polarization (both 2D-TM and 2D-TE). The study deals, first with...
In this paper, we present quantitative image reconstructions (i.e. permittivity and conductivity profiles) from synthetic and experimental data. First, we perform the qualitative imaging for localizing the target in order to determine the investigation domain. Second, we solve the inverse-scattering problem via an iterative algorithm based on a...
In this paper, we investigate the possibility to perform accurate measurements in W-band. For this, we are making use of a new measurement system we designed, but was installed by NSI. After correction processing, the SNR values for all frequencies, polarizations dielectric and metallic cylinders remain below 20 dB with a best value at 26 dB at...
Dans le cadre du développement d'un système radarmillimétrique pour des applicationsliées à la sécurité, une antenne lentille fonctionnant à 94GHz a été conçue et simulée. Afin de satisfaire à l'application, le diagramme de rayonnement de cette dernière devait posséder un diagramme directif en azimut avec des contraintes...
This paper deals with a detailed study of an original system dedicated to scattering measurements of millimeter waves in the W -band. The system's main innovations lie in its high-precision swivel arm, semianechoic environment, flexibility for positioning the object on the measurement tower, as well as the postprocessing developed to correct...
Scattering properties of millimeter waves (MMW) remain relatively unknown compared to lower frequency bands, although their study is of interest considering the increasing number of civil applications, especially in the W-band. In this paper, we present an efficient measurement set-up that provides scattering measurements with spatial and...
We present an innovative system dedicated to millimeter wave scattering measurements in W-band. The principal innovations are the high-precision swivel arm, use of a semi-anechoic environment, flexibility for positioning the object under study, and post-processing to correct measurement errors. Different test objects are used for evaluating the...