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.
T. H. Hubing and H. Shim, "A Closed-Form Expression for Estimating Radiated Emissions from the Power Planes in a Populated Printed Circuit Board," IEEE Transactions on Electromagnetic Compatibility, Institute of Electrical and Electronics Engineers (IEEE), Jan 2006.
The definitive version is available at http://dx.doi.org/10.1109/TEMC.2005.861377
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)
Article - Journal
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