Identification of temporal sources for transmission lines applications

The idea of identifying a source that produces a specified electromagnetic field at a given point in space has received considerable attention over the past twenty years or so. Many techniques allow in theory to generate arbitrary electromagnetic fields in any given environment. One of them, the time reversal (TR) method, first applied in acoustics, has been popularized by M. Fink and his team [1] and has since spread in various other domains, including electromagnetic compatibility applications [2]. The advantage of such method is its simplicity, however, its major weakness lies in focusing a quantity of interest (electric field, current …) at one physical point of the domain and one instant of time. If more complex conditions are needed (e.g. enforcing the duration or the form of the imposed current/voltage/electric field), alternative methods are required.