A Basic Overview of EMI Shielding Techniques & Concepts
Suppress noise in your electronics with these EMI shielding techniques, including some new shielding options from advanced electronic materials companies. As modern electronics continue to run at higher speeds, high frequencies, and higher densities, electromagnetic interference (EMI) has become more difficult to address. Reduction of EMI in electronics design is sometimes seen as quite esoteric and is often overlooked by many designers. Designers may not realize they have EMI problems until a prototype is sent out for EMC testing, creating delays in production schedules and product launches as the design is debugged and reworked. EMI problems can originate from multiple places in a PCB layout. The exact cause of an EMC testing failure can be a mystery without the right measurement equipment and some experience. As a result, designers will often try every possible PCB layout change until they manage to pass an EMC test, or they end up settling with bulky metal shielding applied to some components. However, there are some EMI shielding techniques that focus on the enclosure rather than the PCB layout. These more sophisticated solutions are being enabled by a range of advanced materials, which can eliminate failed board spins, redesigns, and production delays. This whitepaper will serve as a basic introduction to these effective EMI shielding concepts and solutions.
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