Abstract:

To improve the SSN （Simultaneous Switching Noise) suppression performance of the planar EBG （Electromagnetic Band-Gap) structure, a novel pla
nar HB-BG (Hybrid Bridges EBG) is proposed by applying the concept of “united cells method” in the unit cell. In our proposed HB-BG, the -40 dB stopband is
 achieved from 225 MHz to 15 GHz. The lower cutoff frequency is decreased from 432 MHz to 225 MHz as compared to the EBG structure with LBS (L-shaped Bridges and Slits). A lower band-gap center frequency is also obtained. The signal transfer characteristics of the localized HB-EBG are studied. Wideband SSN suppression and good signal integrity are successfully verified by simulations and measurements.

Key words: electromagnetic band-gap (EBG), signal integrity (SI), power integrity (PI), simultaneous switching noise (SSN), stopband