The New Structure In Artificial Power Integrity

Power distribution network (PDN) design has become one of the major concerns in designing high-speed circuits or mixed-signal systems in recent years. The challenge is expected to increase in next decade, as electronic systems are driven in the direction of faster digital speed, higher integration with RF circuits, and higher throughput of data communication. The PDN noise above gigahertz will be expected to be serious because the distributed and parasitic effects of the PDN become dominant at higher frequencies, which could result in power integrity (PI) issue, signal integrity (SI) issue and electromagnetic interference (EI) issue. Several methods on suppressing the simultaneously switching noise (SSN) have been proposed, among those applying the electromagnetic bandgap (EBG) structure is a widely used method in recent years. In this thesis, a novel power/ground plane pair based on a novel EBG structure is proposed, which can efficiently eliminate the SSN within a broad-band frequency range. The fabrication is simple and low-cost.Firstly, this thesis introduces some basic information about PDN and EBG structure.Secondly, a novel EBG structure called "C-EBG" is proposed to replace the power plane of the novel power/ground plane pair.Thirdly, in order to efficiently predict the lower bound cutoff frequency of the C-EBG structure, a simple2-D equivalent circuit model is established to calculate the dispersion diagram. Besides, the upper bound cutoff frequency could be predicted by the parallel plate resonator formula. By comparing the simulated and measured results of the S-parameter between different ports, good agreement can be seen.Finally, the substrate integrated artificial dielectric (SIAD) is used to reduce the size of the unit cell of the C-EBG structure. The same method mentioned before is used to predict the lower and upper bound cutoff frequency of the SIAD-C-EBG structure.