Novel Subregional Embedded Electromagnetic Bandgap Structure for SSN Suppression

TLDR: In this paper, a subregional embedded electromagnetic bandgap (EBG) structure for suppressing simultaneous switching noise (SSN) was proposed by analyzing the SSN suppression mechanism, which achieved an ultrawide bandgap extending from 380 MHz to 10 GHz at the suppression depth of −30 dB by both simulation and measurement.

Abstract: A subregional embedded electromagnetic bandgap (EBG) structure for suppressing simultaneous switching noise (SSN) is proposed by analyzing the SSN suppression mechanism. In this paper, a novel EBG structure is designed on the basis of periodic L-bridge, while, a small middle L-bridge (SML-bridge) cell with reverse meander line is embedded into each L-bridge unit. The L-bridge unit is divided into two regions. It is shown that the SML-bridge cell achieves an ultrawide bandgap extending from 380 MHz to 10 GHz at the suppression depth of −30 dB by both simulation and measurement. SML-bridge cell external is verified to meet signal integrity (SI) by the time-domain simulation. In addition, the conclusion for the noise suppression effect is estimated by equivalent circuit models and parallel-plate waveguide theory. Furthermore, the IR-drop and the dc resistance are accurately investigated by the simulation. Eye patterns are generated for analyzing the SI compared with the traditional L-EBG plane.