The EMC Challenge: Balancing Advanced Attenuation With Cost Concerns

In a recent application at Optima EPS, An Elma Company the customer required a minimum electric fi eld attenuation of 60 DB of shielding effectiveness from 100 KHZ to 1 GHZ decreasing to a minimum of 55 DB at 10 GHZ. As the enclosure was quite large (70” H by 36” D), using certain techniques was not cost-effective. Optima’s challenge was to solve the EMI problem while keeping costs reasonably low.