KEYWORDS: Electromagnetism, Signal analyzers, Surface plasmons, Radio propagation, Modulation, Wave propagation, Information science, Refraction, Electrons, Life sciences
Uniform asymptotic technique, developed by Bleistein and Handelsman, is applied to find asymptotic representation for the evolution of harmonic, amplitude modulated signal in a dispersive Lorentz medium. The results obtained are uniform in space and time and under mature space/time conditions recover Sommerfeld and Brillouin precursors followed by the main signal. In a special case Sommerfeld and here obtained results are in full agreement.
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