Title :
The effect of grounding on radiated emissions from heatsinks
Author :
Dawson, J.F. ; Marvin, A.C. ; Porter, S.J. ; Nothofer, A. ; Will, J.E. ; Hopkins, S.
Author_Institution :
Dept. of Electron., York Univ., UK
Abstract :
The paper presents results which demonstrate that radiated emissions from heatsinks are reduced by an amount that depends upon the distribution and impedance of the grounding structure. Results are also presented which show the effect on radiated emissions of the presence of conductors (e.g. PCB tracks) passing under the heatsink. The presence of conductors reduces the effectiveness of the heatsink grounding but, in most cases, emissions at high frequencies do not exceed those without conductors attached
Keywords :
earthing; electric impedance; electromagnetic interference; heat sinks; method of moments; printed circuits; PCB tracks; conductors; grounding effects; grounding structure distribution; grounding structure impedance; heat sink grounding effectiveness; heat sink radiated emissions; Conductors; Electromagnetic measurements; Electromagnetic radiation; Grounding; Heat sinks; Impedance; Laboratories; Numerical models; Solid modeling; Wires;
Conference_Titel :
Electromagnetic Compatibility, 2001. EMC. 2001 IEEE International Symposium on
Conference_Location :
Montreal, Que.
Print_ISBN :
0-7803-6569-0
DOI :
10.1109/ISEMC.2001.950617
