Is DC Power Transmitted by Electromagnetic Waves?
Professor Mingyu Lu from West Virginia University has been invited to deliver a talk on experimental and analytical studies regarding DC waveguides. Firstly, he contrasted the theoretical understanding that conductors transmitting DC signals do not form a waveguide, due to the decoupled nature of static electric and magnetic fields, with the practical reality that DC signals require finite turn-on and turn-off times, which involve transient states. He then presented the core argument that since these transient states rely on electromagnetic wave propagation, the DC signal itself must also be sustained by wave propagation. Finally, he shared experimental results that explicitly demonstrate electromagnetic wave propagation during DC signal switching, as well as analytical studies based on transmission line theory proving that electromagnetic waves persist even in the DC steady state. He concluded that, in practice, two pieces of conductor behave as a waveguide when transmitting DC signals, as the electric and magnetic fields remain coupled.
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Mingyu Lu of Organization West Virginia University
Is DC Power Transmitted by Electromagnetic Waves?
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Address:Morgantown, West Virginia, United States