RATAJCZAK , Philippe

In this paper, a patch antenna is designed forspatial modulation and ambient backscattering application at3.5GHz. Its goal is to pave the way for numerical com-munications towards 5G and IoT (Internet of Things). Forthose it is essential to design new antennas, that are compact,energy saving...

Cette étude présente une méthodologie de mesure d'antenne pour le protocole GPS sans câble coaxial. Une liaison Bluetooth est utilisée pour récupérer les informations de rapport signal à bruit d'un module commercial intégré avec l'antenne à caractériser. Un exemple de mesure est réalisé sur une antenne imprimée dans un terminal miniature et un...

This work present the experimental assessment of frequency bandwidth limits on 2x2 cm antenna embedded in a 5x5cm terminal at 900MHz. A meander Inverted F antenna is synthesized, prototyped and measured. The operating frequencybandwidth and radiation efficiency are extracted from radiation measurement. Comparison with optimal bounds on the...

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 study the performance of a compact measurement solution to calibrate and assess over-the-air (OTA) performance of FR2 active antenna array. Radiation pattern can automatically measured for multiple beamforming configurations in Tx and Rx mode. The open configuration make the debug and testing easier in the early stage of the project....

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...

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...

Dans cet article, une lentille imprimée en technique FDM est éclairée par un réseau de patch pour réaliserune antenne directive reconfigurable sur un angle d'ouverture de +/-12°. Une base compacte est utiliséepour réaliser la mesure à 27GHz et valider les performances en gain de la structure proposée.

In this paper, we introduce new correlation technologies for measuring Power-Density of mobile devices in the framework of Over The Air (OTA) testing. The correlation technologies use convolutional signal processing algorithms. Measurements obtained using minimally invasive ElectroOptical (EO) probes are compared to those from classical...

This paper investigates the performance of a 3D-printed plastic lens operating in the 120 GHz frequency band. An Integrated Passive Device module with built-in linearly polarized patch antenna is used as the source of the lens. The profile of the lens is based on elliptical shape. It is first optimized with Geometrical Optics and Physical...