Methodology for evaluating practical EMI design guidelines using EM analysis programs

Most companies oflering products that mus t pass FCC or’ other regulatory agency specifications have compiled EMI design guidelines which are practiced b y their engineers. I n this paper, we take one such practical E M I design guideline and, through extensive use of a state-of-the-art electromagnetic analysis code, investigate its range of applicability, and show its lamitations. The emphasis is placed on the methodology, rather than the guideline itself, so that a framework is established under which other EMI design guidelines can be similarly “revisited”.