"I keep running into the same EMC problems over and over," EMC Engineer Kenneth Wyatt told an audience of some 40 engineers at a meeting of the Greater Boston IEEE EMC Society. The meeting took place on September 16 at the Bose Corp. headquarters in Framingham, Mass.
Gaps in return planes are one cause of the common-mode currents that produce unwanted emissions. Why? Because current returning to its source has to go around gaps, which lengthens the return path and enlarges the loop that current has to travel. In the video below, Wyatt explains where gaps occur, the emissions problems they cause, and what to do about them.
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