Farzad Karami présente sa thèse

https://uqo.zoom.us/j/83296031227?pwd=2Kg3BWvTDIpgwGkzaCNTTAH0FCJuDz.1

Meeting ID: 832 9603 1227

Password: 498774

Présentation de : Farzad Karami

Titre : ANALYSIS AND DESIGN OF NOVEL DIPLEXING AND BEAMFORMING ANTENNA SYSTEMS FOR SATELLITE COMMUNICATIONS AND IOT APPLICATIONS

Résumé:

Microwave and millimeter-wave wireless systems have revolutionized communication technologies, driving innovation across domains such as satellite communications, smart transportation, and the Internet of Things (IoT). Operating within the 1–300 GHz spectrum, these systems enable ultra-high data rates, efficient spectrum utilization, and reliable connectivity, making them indispensable for emerging applications. However, the implementation of these systems faces significant challenges, requiring novel design approaches to address issues such as bandwidth efficiency, cost-effectiveness, and system compactness.

This doctoral thesis presents a series of innovative designs to overcome these challenges and advance the application of microwave and millimeter-wave systems. The first study introduces a compact Ku-band diplexing structure and a two-port directive end-fire antenna for high-speed railway networks, achieving high reliability and performance. The second study focuses on a multifunctional switched-beam architecture for vehicular-to-satellite communication, significantly enhancing scanning coverage and channel capacity. The third study develops a broadband millimeter-wave rat-race coupler based on parallel microstrip lines, covering the 20–42 GHz range, which is then applied to design a thin monopulse antenna system for space debris detection on satellite exploration missions.

These contributions address critical challenges in the design and implementation of next-generation communication systems, paving the way for high-performance, cost-effective solutions in cutting-edge applications. This work advances the state of the art in wireless communication and demonstrates the potential of microwave and millimeter-wave technologies to shape the future of connectivity, safety, and efficiency in diverse fields. 

Jury d’évaluation :

Président: Prof. Michael Korwin-Pawlowski (UQO)

Évaluateur externe : Prof. Badr Eddine Ratni (Université Paris-Nanterre)

Évaluateur interne : Prof. Tinko Eftimov (UQO)

Directeur de thèse : Prof. Halim Boutayeb (UQO)

Co-directeur de thèse : Prof. Larbi Talbi (UQO)