Enhancing Radomes Functionalities and Active - Brest, France - IMT Atlantique
Description
Enhancing Radomes functionalities and active antennas performances for millimeterwave reconfigurable multibeam solutions using additive manufacturing & flex technologies:
- Réf
ABG-120997 - Sujet de Thèse 08/03/2024
- Financement public/privé
- IMT Atlantique
- Lieu de travail
- Brest
- Bretagne
- France
- Intitulé du sujet
- Enhancing Radomes functionalities and active antennas performances for millimeterwave reconfigurable multibeam solutions using additive manufacturing & flex technologies
- Champs scientifiques
- Télécommunications
- Electronique
- Mots clés
- Design and synthesis of multibeam antennas, active antenna, millimeter antennas, 3D integration technologies, electromagnetic modeling, integrated antennas, electromagnetic coupling, radome, holograms, metasurfaces
Description du sujet:
Consequently, 5G imposes major technological and architectural innovations, notably radio access based on beamforming for spatial diversity and communication capability.
In addition, spectrum resources will be highly solicited for providing enhanced bandwidth over wider frequency ranges, with consequently new expectations regarding millimeter wavelengths.
Development of smart antennas capable of adapting their beams according to the channel within multiple bands requires going beyond conventional antenna design methods, but also to develop an electronic front-end capable of probing the immediate electromagnetic environment and controlling the antenna pattern.
-
Ambitions for mmwave antennas
- Objectives
The main challenges in the millimeter band lie in the design of energy-efficient systems inducing co-designed RF circuits and antennas.
The objectives are to create reconfigurable antenna solutions with beamforming and multi-users MIMO capabilities, and to design advanced digital processing techniques to manage these systems.
A high-gain and wideband antennas remain mandatory at mmWave frequencies to exploit efficiently the huge available spectrum.Array solutions including thousands of elements guarantee the required power budget specifications in terms of realized gain and EIRP (Effective Isotopically Radiated Power), as well as sectorization possibilities through individual amplitude/phase controls.
Nevertheless, specific investigations have to be done regarding spatial feeding techniques to achieve extremely energy efficient solutions, while preserving flexibility on multibeam radiation patterns possibilities.
Emerging concepts are addressed by this thesis, considering new combinations of low-profile transmit-array or flat-lens architectures with alternative beamforming approaches exploiting either holographic techniques or artificial beamforming through surface impedance modulations.
Indeed, a spatial surface impedance modulation controlled through holographic techniques or metamaterial structuration can be exploited to transform a reference excitation mode to guided surface mode and then to a desired radiation pattern through an appropriate controlled nearfield illumination.
A near-field illumination of the planar array can be ensured through 3D multi-materials-based radome-likely functionalities using additive manufacturing, eventually combined with flexible technologies to report tuning components for holographic mode control.
-Methodology
- Study approach
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