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.