Four-Layer Reflection-Symmetric Structure in Common and Differential Modes

This paper investigates a four-layer reflection symmetric structure in common and differential modes. By using electrodynamic approach, the authors simulated S parameters and represented them into time responses in the Advanced Design System 2022. The study shows that the ultra-wideband pulses are decomposed into the sequence of pulses with lower amplitudes. To evaluate these pulses, the authors used N-norms. It was found that the MF under investigation allows significant attenuation of the ultra-wideband interference in both modes. Thus, the N1 value for the differential mode decreased by 4.51 times, N2 by 5.82 times, N3 by 1.34 times, N4 by 1.34 times, and N5 by 2.64 times. For the common mode, N1 decreased by 2.97 times, N2 by 4.64 times, and N5 by 1.7 times. The signal integrity analysis in differential mode demonstrated that structure under study may be used for protecting signal circuits against ultra-wideband interference.