Le 19 septembre dernier, XLIM recevait le professeur invité Langis Roy de Ontario Tech University, Oshawa, Canada.  TACTIC a notamment financé l’accueil de Pr Langis Roy à l’Université de Limoges comme professeur invité.

L’occasion pour nos étudiants de Master et Doctorants d’assister à son séminaire sur le thème « Reconfigurable Wireless Components using the Field-Programmable Microwave Substrate (FPMS) ».

Découvrez le résumé de sa conférence et bio ci-dessous :

Abstract

Next generation wireless communications promise unprecedented levels of capability, whether it be faster data rates, expanded coverage, greater reliability or combined integration with sensing, communication and computing functions. Such advances increasingly call for reconfigurable RF front-ends having tunable/agile/multi-band filters, amplifiers, matching networks, interconnects and antennas. Currently available reconfigurability techniques are often component-specific and introduce considerable circuit complexity. This lecture presents the Field-Programmable Microwave Substrate as an alternative means of achieving arbitrary microwave circuits which are intrinsically (and highly) reconfigurable. The fundamental operating principle – that of a metamaterial made up of small unit cells whose effective dielectric constant can be switched between various positive and negative states – will first be explained. This will be followed by the derivation of a 2D equivalent circuit that represents the resulting programmable artificial transmission line and basic circuit building block. Then, a number of FPMS-based reconfigurable circuits operating in the 1-3 GHz and 10-14 GHz bands will be shown: waveguides, couplers, filters, phase-shifters and antennas, some of which exhibit the highest degrees of tunability ever reported. The lecture will conclude with the current state of FPMS research and prospects for further advancements.

Biography

Langis Roy received the B.A.Sc. degree in electrical engineering from the University of Waterloo, Waterloo, ON, Canada, and the M.Eng. and Ph.D. Degrees in electrical engineering from Carleton University, Ottawa, ON, Canada. From 2005 to 2006, he was a Visiting Professor with the VTT Micro-modules Research Center, Oulu, Finland, and an Invited Professor with the INSA Electrical and Computer Engineering Department, Toulouse, France. From 2009 to 2010, he was an Invited Researcher with IETR/Université de Rennes, Rennes, France. He has been a faculty member with the Department of Electrical and Computer Engineering, University of Ottawa, and also with the Department of Electronics, Carleton University. He is currently a Visiting Professor at University Limoges XLIM Institute in France and Professor of electrical engineering with Ontario Tech University, Oshawa, ON, Canada, having previously served as its Dean of Graduate and Postdoctoral Studies and Deputy Provost from 2015 to 2023. He has co-authored over 100 scientific papers and holds three patents on RF system-on-package designs. His current research interests include microwave electronics, integrated active antennas, reconfigurable microwave components, wireless sensors, high-performance electronic circuit packaging, and aerospace/automotive applications, now extending to terahertz biosensing and wireless power harvesting.