The development of new architectures of active antennas requires compact circulators/insulators in Ku-band (15 – 17 GHz). The components should allow a CMS (surface-mounted component) carry over to PCB. These constraints will require the development of new LTCC-compatible ferrites with higher saturation magnetization than those developed for the X-band in the framework of a previous European project (LOCCIMIM). The gain in compactness will also be approached from the angle of topological optimization of the Y-junction. The proposed thesis will focus on the specific aspects of circulator modelling, in particular through the use of models for predicting the permeability of magnetized ferrites taking into account spatial inhomogeneity (so as not to undergo the effects of field inhomogeneity related to the polarization of the circulator by a permanent magnet but to take it into account at the design stage), and the technological problem of the realization of demonstrators in LTCC technology (co-sintering dielectric/ferrite/metallization, integration of the CMS type connector). To do this, the doctoral student will benefit from the expertise of the lab-STICC-UBO in the design of ferrite components and that of the lab-STICC-IMT Atlantic on LTCC technology.
Supervisors : Lab-STICC-UBO (Patrick Queffelec and Vincent Laur), Lab-STICC-IMT Atlantique (Vincent Castel and Camilla Karnfelt)
Industrial partners : Thales Optronics, Thales Research and Technology
This thesis concerns the research and experimentation of an online model of active learning for the detection of weak signals in data streams. It is focused on application in video surveillance and other data streams online applications. It will be experimented thanks to Big Data systems and Lambda architecture hosted and supported within the company DATA2B, allowing to run offline and online analysis tasks in parallel processes. The PhD student will work with private and academic research teams. He/She will be employed by the company (CDD CIFRE). Candidates wishing a permanent position as an associated R&D Director for online analysis after the thesis are welcome. Please read the pdf file for a detailed description.Download : detection_of_weak_signals_in_video_streams_d2b_imt.pdf (111.41 ko)