Checkerboard-Shaped Electromagnetic Bandgap Structure Combining Metamaterial-Based Absorber for Simultaneous Switching Noise Suppression

This work explores the role of metamaterial-based absorber (MA) in improving performance of electromagnetic bandgap (EBG) structure to restrain the simultaneous switching noise (SSN) in high-speed digital systems. A meander line-shaped MA (ML-MA) is proposed with bandwidth from 7.0 - 14.7 GHz of which the absorption achieves more than 80%. A novel checkerboard-shaped EBG structure is formed by arranging the MA and tricyclic nested EBG unit periodically achieving wideband suppression of SSN ranges from 0.3GHz to more than 30 GHz. With the composite effect, the suppression depth is enhanced up to 28.5 dB in the ML-MA absorption band.