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Theses

Design and measurement of multi-antenna systems toward future 5G technologies

Abstract : This PhD thesis studies the technologies of the 5th generation of mobile communication such as MIMO and Massive MIMO as well as the various challenges brought by the appearance of these new technologies. For this purpose, a specific test bench for characterizing the performance of MIMO antennas in WLAN and LTE has been implemented. The first the setup was made from Rhodes & Schwarz measuring instruments. The opportunity to work with EURECOM led us to develop a second test bench using the OpenAirInterface, an open-source platform exploiting software-based radio systems. We designed and built a series of Wi-Fi router prototypes consisting of eight antennas. Each prototype is made from different antennas (printed, 3D ...). We also produced a second series of Wi-Fi router prototypes consisting of eight antennas printed on plastic using LDS technology. A measurement campaign was carried out with these prototypes on the test bench mentioned above to extract useful antenna performance criteria for MIMO applications. These studies aim to provide optimization elements on MIMO techniques from an antenna point of view. A second part of this thesis is dedicated to the millimeter frequencies that are at the heart of 5G. We designed a mobile phone prototype consisting of four millimeter antennas. A measure to take into account the interference with the human body has been put in place to study the constraints related to the implementation of millimeter antennas in future mobile terminals.
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Submitted on : Tuesday, November 20, 2018 - 11:03:06 AM
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  • HAL Id : tel-01927889, version 1

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Cyril Buey. Design and measurement of multi-antenna systems toward future 5G technologies. Electronics. Université Côte d'Azur, 2018. English. ⟨NNT : 2018AZUR4023⟩. ⟨tel-01927889⟩

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