Modeling and optimal design of shorting vias to suppress radiated emission in high-speed alternating PCB planes
Journal
IEEE Transactions on Components, Packaging and Manufacturing Technology
Journal Volume
1
Journal Issue
4
Pages
566-573
Date Issued
2011-04
Author(s)
Abstract
An analytical mode analysis of vias in the multilayered printed-circuit-board periphery is developed to suppress the electromagnetic radiation induced by ground bounce. After separating the even and odd modes in alternating planes, the far-field radiation of parallel plates is derived using Huygens' principle. It is mainly contributed by the odd mode excitation, while the even mode sets a lower bound on the radiation level from the system when shorting vias are inserted between alternating ground plates. For the odd-mode radiation, a canonical problem is then constructed and analytically solved by applying image theory. Based on that, a systematic approach to achieve the optimum suppression design is developed for the various geometry parameters of the shorting vias, including the pitch, radius, and distance to the board edge. Full-wave simulation and measurement are also presented and the good agreement with the theoretical prediction validates the correctness and efficiency of the present analysis and design. © 2011-2012 IEEE.
Subjects
Canonical problem; duality; electromagnetic interference (EMI); Green's function; ground bounce noise; mode theory; radiation; shorting via
SDGs
Other Subjects
Canonical problems; duality; Ground bounce noise; Mode theory; shorting via; Green's function; Heat radiation; Signal interference; Electromagnetic pulse
Type
journal article