Accelerating the numerical computation of indirect lightning effects by means of vector fitting

[摘要] In the context of numerical computation of indirect lightning effects it iscustomary to use volume-discretizing methods in time domain, such as theFinite Difference Time Domain (FDTD) method, the Finite Integration Technique(FIT), or the Transmission Line Matrix (TLM) method. If standard lightningelectromagnetic pulses (LEMPs) of tenths of microseconds duration are used asexcitations, these methods require long computation times, as implied by theCourant criterion. It is proposed to use shorter pulse formsand to compare the transfer functions obtained by different pulse durations bymeans of macromodels that are obtained from the vector fittingmethod. Numerical computation of lightning related transfer functions of acanonical structure indicate that the duration of the exciting pulse cantypically be shortened by at least one order of magnitude if compared to astandard pulse.

[学科分类] 电子、光学、磁材料