Abstract
This chapter deals with the transient analysis of buried cables using the wire antenna theory and applying both the frequency and the time domain approach. On one hand, if the solution for a large number of incident waves arriving from various directions is of interest then the frequency domain approach is appropriate. On the other hand, for some electromagnetic compatibility applications in which accurate frequency data are required, the frequency samples obtained by the use of Fourier transform do not ensure accurate results and the time domain approach would be a better choice. Particularly, the direct time domain approach is convenient if the transient response is required only for the early time behavior, since the frequency domain approach requires computing of the frequency response up to the maximum effective frequency and the entire range of frequency spectrum has to be transformed. The frequency domain model is based on the Pocklington integral equation while the time domain formulation deals with the Hallen integral equation approach. Both the Pocklington and the Hallen equation are handled via the appropriate Galerkin–Bubnov scheme of the indirect boundary element method. The strengths and weaknesses of both approaches are discussed.
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