Design Of EMC Shielding

Shielding is an essential part of an EMC design. It is sometimes thought that excessive shielding is an indication of inadequate attention being paid to other aspects of EMC design and that it is therefore an admission of defeat. Circuits must be designed to minimise emissions and maximise their immunity to interference. However, there can be no certainty that a product will not experience excessive interference either as a result of exceptional circumstances, or due to the negligence of others. Designing a good shield therefore provides a means of controlling interference which is under the designer's control and is relatively immune to external factors. This paper describes work which is part of a collaborative programme between York and Nottingham Universities and covers all aspects of an integrated EMC design. (3 pages)