An expression for the maximum intensity of radiated emissions from a rectangular power bus structure has been derived based on an analytical cavity-resonator model. The effect of components mounted on the board is modeled by modifying the propagation constant of the waves within the power bus structure. The radiated field intensity is calculated using the equivalent magnetic current around the edges of the power bus structure together with the modified propagation constant. Measurements of a populated test board show that the derived closed-form expression estimates the level of the maximum radiation intensity with reasonable accuracy.


Electrical and Computer Engineering

Keywords and Phrases

Cavity Model; Cavity Resonators; Cavity-Resonator Model; Decoupling; Equivalent Magnetic Current; Magnetic Fields; Populated Printed Circuit Board; Power Bus Noise; Power Bus Structure; Power Planes; Printed Circuits; Propagation Constant; Radiated Emissions; Radiated Emissions Estimation; Radiated Field Intensity; Rectangular Power Bus Structure

International Standard Serial Number (ISSN)


Document Type

Article - Journal

Document Version

Final Version

File Type





© 2006 Institute of Electrical and Electronics Engineers (IEEE), All rights reserved.

Publication Date

01 Jan 2006