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ISSN Druckformat: 0040-2508
ISSN Online: 1943-6009
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Electromagnetic Step Signal Propagation in Lossy Waveguide
ABSTRAKT
Propagation of the transient electromagnetic field in a waveguide with the perfectly conducting surface of arbitrary cross-section which is filled with a lossy medium is considered. Time Domain Method of Waveguide Evolutionary Equations has been used, and original initial-boundary value vector problem for Maxwell's equations has been reduced to integration of the one-dimensional Klein-Gordon scalar equation. Its solution is obtained as an expansion in terms of a suitable for Time Domain Method basic set. The expansion coefficients are readily derived through the same decomposition of the input signal. Analytical forms of early- and late- time approximations for propagating electromagnetic signal are presented, and the validity conditions for the exact solution are discussed.