Electromagnetic interference shielding solutions for integrated circuits

Integrated circuits (IC) operate in increasingly complex environments in terms of electromagnetic compatibility (EMC). Over time, ICs have implemented certain features that enable higher performance. Among these features, it is worth mentioning the use of higher frequencies, which are often electromagnetic interferences (EMI) sources. In addition, the device size reduction makes it difficult to introduce some specific elements to avoid EMC problems. For this reason, using board-level shielding (BLS) solutions can solve many problems. One of the most widespread methods, shielding cabinets, is discussed in this paper. Shielding cabinets are a kind of metal box that encloses the IC and insulates it. It can enclose the EMI source as well. The objective of this paper is the characterization of different models of shielding cabinets up to 5 GHz. The cabinets are characterized through two experimental measurements and a group of simulations.