A Novel Electromagnetic Bandgap (EBG) Structure for Electromagnetic Compatibility (EMC) Application

The EMC issues become possible critical problems for high speed, large scale or complex systems such as PCs, servers or automotive application, which cause significant time delay or extra developmental cost. A novel electromagnetic band-gap (EBG) structure is proposed in this paper. It can be easily fabricated on standard PCB material and can be used where space is at a premium. The cells of EBG structures are designed and developed to provide two stop bands at 2.8 GHz similar to 3.2 GHz and 4.3 GHz similar to 4.8 GHz. By properly arranging the unit cell dimension and location, the mutual coupling between transmission lines in multi-layers structure can be reduced. Several cases of different layout skill. have been studied in this paper. The experimental results demonstrate that the mutual coupling between signal lines is effectively suppressed when the EBG structures are properly designed. They are suitable for EMC applications.