The paper gives arguments for the topicality of electromagnetic compatibility modeling. Trends of electromagnetic simulation software development are stated. General simulation process based on method of moments is described. On examples of interconnects the improvement of simulation is shown, obtained by means of decrease of computational costs on segmentation and solution of linear algebraic systems. Time response calculation is described and results of waveform animation are presented. Recently designed testing tools are briefly described. Keywords-electromagnetic compatibility; interconnects; method of moments; adaptive iterative choice of the optimal segmentation; linear systems; softwareI.

Pulse decomposition in the turn of a meander line with the homogeneous dielectric filling is analyzed in detail. The study shows that the ultrashort pulse in the turn of a line with strong half-turn coupling is decomposed to subsequent pulses, having levels of 60, 60, -40, 20, -10%, when compared with a signal in the beginning of the turn. We obtained the conditions, providing decomposition of an ultrashort pulse into subsequent pulses. The research reveals the optimum value of capacitive coupling coefficient, being equal to 0.9, and providing the minimum level of pulses in the line end.

The possibility of protection against ultrawideband (UWB) pulses, based on the combination of distortions in a meander together and modal decomposition phenomena, is shown on the example of meander microstrip line. It is revealed that UWB pulse at the end of a line can be decomposed into a sequence of pulses of lower amplitude not exceeding 40% of the pulse level at the beginning of the line. Index Terms -UWB pulse, even and odd modes, meander line, modal decomposition.

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The research presents universal conditions which allow the complete splitting of a dangerous pulse (DP) in a meander microstrip line (MMSL) of any number of cascades. The verification of the conditions was performed on the example of an MMSL of two, three, four and five cascades. Attenuation (times) of a DP in the MMSL of three turns was 8.1, of four turns – 19.9 and of five turns – 33.16.