BUEY , Cyril

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...

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Handheld devices are strongly impacted by user effect, especially as millimeter waves are targeted for 5G. In order to design optimal antenna systems, the radiation measurement of the antenna performance with user effect beyond 10GHz is needed. The study present a test-bed enabling the measurement of 3D radiation pattern with the impact of a...

This paper presents a low-cost measurement method for MIMO antenna performance assessment based on the open-source OpenAirInterface initiative. A first measurement is presented with a prototype with 8 antennas at 2,6 GHZintegrated into a 140x140x40 mm fento cell and using Laser Direct Structuring (LDS) technique. The setup is...

In this paper, a 5G MIMO mobile phone prototype including four antennas working in the 10-13.2 GHz band is designed. The objective of the study is to evaluate the negative impact due to the user's hand in frequencies higher than 10 GHz. A 3D spherical near-field scanner with fixed Antenna Under Test (AUT) is leveraged in order to measure a 3D...

We study the transmit time reversal beamforming in a 8x1 MISO communication system at 2.68GHz. We consider the downlink time reversal transmission where a BS communicates with one user. A prototype composed by 8 antennas and designed by Orange labs acts as the BS while the user has a single antenna. The reciprocity property is destroyed by the...

This paper presents a low-cost measurement method for MIMO antenna performance assessment based on the open-source OpenAirInterface initiative. MISO 8×1 measurements are presented to experimentally prove the reproductibility of the test method, using a prototype with 8 antennas at 2.6 GHz integrated into a 140×140×40mm femto cell. The results...

In this paper, the design of an MIMO antenna system for WIFI gateway application is proposed. 8 printed monopole dual band antennas are placed on a 135×135mm 2 FR-4 PCB. Placement of the elements is optimized to limit coupling effect. The objective of the system is to combine the MIMO technique and antenna diversity to increase data rate...