Abstract
In modern printed electronics, the performances of a circuit and a device are severely deteriorated by the electromagnetic noise in the gigahertz (GHz) frequency range, such as the simultaneous switching noise and ground bounce noise. A compact and multi-stack electromagnetic bandgap (CMS-EBG) structure is proposed to suppress the electromagnetic noise over the GHz frequency range with a short distance between a noise source and a victim on multilayer printed circuit boards (MPCBs). The original configuration of the stepped impedance resonators is presented to efficiently form multiple stacks of EBG cells. The noise suppression characteristics of the CMS-EBG structure are rigorously examined using Floquet-Bloch analysis. In the analysis, dispersion diagrams are extracted from an equivalent circuit model and a full-wave simulation model. It is experimentally verified that the CMS-EBG structure suppresses the resonant modes over the wideband frequency range with a short source-to-victim distance; thus, this structure substantially mitigates GHz electromagnetic noise in compact MPCBs.
Highlights
The multilayer printed circuit board (MPCB) technology is widely used in recent printed electronics
With the rapidly growing demand for electronics with massive computation capability and a small form factor, the MPCB technology has been significantly developed for mixed-signal applications, where high-speed digital devices and wireless communication devices are integrated in the same MPCBs
Digital devices are known to generate wideband electromagnetic noise in the gigahertz (GHz) frequency range, which severely degrades the performance of the other circuits including themselves [1,2,3,4,5]
Summary
The multilayer printed circuit board (MPCB) technology is widely used in recent printed electronics It provides a reliable and cost-effective manufacturing process and realizes high-speed interconnects, power buses, and passive planar components. Various devices such as RF, analog, memory, and digital chips are mounted on the MPCBs. Digital devices are known to generate wideband electromagnetic noise in the gigahertz (GHz) frequency range, which severely degrades the performance of the other circuits including themselves [1,2,3,4,5]. The GHz-noise coupling through direct current (DC) power buses in MPCBs is a significant
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