Computational Electromagnetism with Moving Matter and Some Quantum Phenomena
The analysis of electromagnetic problems with moving objects has many applications: RF Doppler radars, astrophysics, GPS, electromagnetic gyroscopes… This seminar proposes an original and thorough analysis of the behavior of electromagnetic waves in the presence of moving bodies by using the Finite Difference Time Domain (FDTD) method. Movements are implemented by changing positions of the objects at each time step, through the classical FDTD time loop. With this direct approach, time is implicitly absolute and Voigt-Lorentz transformations are not implemented. This technique is suitable for non-relativistic speeds, thus for most encountered electromagnetic problems, especially in antennas and propagation domain. The numerical aspects that need to be considered are studied. Then, different problems are investigated: moving plane wave source with resistors, moving observation point, moving inclined Partially Reflecting Surface (PRS), moving line source, and moving metallic cylinder illuminated by a plane wave. The results, in terms of Doppler frequency shift and changes in amplitude of the electric field, are compared with those of special relativity which are considered as the references. Some aspects of special relativity are present in the direct FDTD approach, such as the independence of the velocity of electromagnetic wave propagation with the speed of the source and Lorentz local time (with a different physical interpretation). Some of the obtained results agree with special relativity. Other ones are different, but the differences are negligible for non-relativistic speeds. Techniques are proposed for the implementation of relativistic effects. The results obtained with our analysis bring new physical insights on the propagation of waves with moving bodies. In particular, it is shown that the amplitude of the electric field for an ideal plane wave source does not increase with the speed of motion. Moreover, for a moving scattering metallic wire, one can observe a phenomenon similar to shock waves. Other analyzed problems include complexes motions (multiple speeds, acceleration, rotation, oscillation), moving airplanes, Michelson-Morley interferometer, Sagnac effect, Heaviside faster-than-light analysis. Some quantum phenomena (Compton experiment, blackbody radiation) are also studied…
Date and Time
Location
Hosts
Registration
- Date: 03 Apr 2025
- Time: 11:30 AM to 12:30 PM
- All times are (UTC-04:00) Eastern Time (US & Canada)
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- 350 Legget Dr
- Ottawa, Ontario
- Canada K2K 3N1
- Building: Hub350
- Room Number: RBCx Finance Quarter
- Starts 03 March 2025 12:00 AM
- Ends 03 April 2025 11:00 AM
- All times are (UTC-04:00) Eastern Time (US & Canada)
- No Admission Charge
Speakers
Professor Halim Boutayeb
Biography:
Halim Boutayeb (IEEE Senior Member) received the Diplôme d’Ingénieur (B.Sc.) degree in electrical engineering from the École Supérieur d’Ingénieur de Rennes, France, in 2000, and the French D.E.A. (M.Sc.) degree and Ph.D. degree in electrical engineering from the University of Rennes, France, in 2000 and 2003, respectively. From March 2004 to December 2006, he was with INRS-EMT, Montréal, QC, Canada. From Jan. 2007 to Dec, 2011, he was a researcher with the École Polytechnique de Montréal, Montréal, QC, Canada. He was also coordinator and a member of the Centre de Recherche en Électronique Radiofréquence (CREER), a strategic cluster on applied electromagnetics and RF technologies. From Jan. 2012 to June 2020, he was a research and development staff member with the Huawei Technologies Company Ltd., Ottawa, ON, Canada. Since July 2020, He has been a professor in electrical engineering at University of Quebec in Outaouais, Gatineau, Canada. He has authored or coauthored more than 100 journal and conference papers, and he holds 24 patents. Since 2003, he has been a reviewer for a number of scientific journals and conferences. His main fields of interest are antennas, microwaves circuits, the finite-difference time-domain (FDTD) method, artificial materials, radars, local positioning systems, biomedical engineering, and phased arrays. Dr. Boutayeb is a senior member of the Professional Engineers of Quebec. He has served as a technical program committee member of the IEEE Vehicular Technology Conference (VTC) 2006 and as a steering committee member of the IEEE Microwave Theory and Techniques Society (IEEE MTT-S) International Microwave Symposium (IMS) 2012. He was a recipient of the Natural Sciences and Engineering Research Council of Canada (NSERC) Postdoctoral Fellowship Grant (2004–2006), the Best Paper Award of the European Conference on Antennas and Propagation (2004), and five Gold Huawei Medal Awards (2013, 2015, 2017, 2018 and 2019).
Agenda
11:30pm - 12:15pm: Lecture by Professor Halim Boutayeb
12:15pm - 12:30pm: Question and Answer (Q/A)