Radiated Emissions from Populated Printed Circuit Boards Due to Power Bus Noise

Hwan-Woo Shim
Todd H. Hubing, Missouri University of Science and Technology
Yan Fu

This document has been relocated to http://scholarsmine.mst.edu/ele_comeng_facwork/1233

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Previous studies have demonstrated that power plane pairs in a printed circuit board are capable of generating significant radiated emissions at resonance frequencies if these resonances are not damped by material or component losses. The paper shows that board resonances may be readily damped by component losses. However, radiated emissions from a damped power bus may still exceed FCC or CISPR limits over a broad band of frequencies.