Time Response Analysis for Reflection Symmetric Meander Lines Using Quasistatic and Electrodynamic Approaches

Abstract

The article discusses the problem of ensuring noise immunity of radioelectronic equipment (REE) from the ultra-wideband (UWB) interference. We consider the protection of REE from UWB pulse using reflection symmetric meander lines (ML) and show the simulation results of such structure with one, two, and three turns. The article shows time responses at the ML output calculated using quasistatic and electrodynamic approaches with losses. The findings are in agreement, indicating the accurate use of numerical methods. Calculated deviations of the amplitude values can be explained by differences in approaches, various considerations of the frequency dependence <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">$\varepsilon_{r}$</tex> and tgδ, and the effect of losses on radiation, which are taken into account in the electrodynamic approach. The results of the voltage waveforms comparison confirm the appearance of combinational pulses, which are revealed only with lossless quasistatic simulations. This fact highlights the significance of structures with partial or complete asymmetry. Since decomposition pulse sequence may contain combinational pulses, the energy can additionally be distributed over time. Thus, it is possible to minimize the maximum of the amplitudes of the mode pulses.