Wideband Simultaneous Switching Noise Isolation in Power/Ground Cavity Structure with Complementary Split Ring Resonators

A novel method of using complementary split-ring resonators (CSRRs) structure in power/ground plane pair for wideband simultaneous switching noise (SSN) isolation is presented. Compared with traditional mushroom-like electromagnetic band gap (EBG) and coplanar EBG, the proposed nested CSRRs structure only need to be partially etched on the power plane and is easy to be fabricated, while the performance of SSN isolation arrives at ideal suppression effect. From the experimental results, a wideband SSN suppression from below 200 MHz to over 25 GHz is achieved with a suppression level of -40dB. Meanwhile, the effect of the proposed structure on the signal integrity (SI) is also analyzed, it is indicated that not only could the proposed CSRRs plane accomplish the excellent wideband SSN suppression but also preserve the reliable transmission quality of the signal in high-speed system.