Simulation of radiated emission during the design phase based on scattering parameter measurement

As the electromagnetic compatibility (EMC) of IC products takes on greater significance for competitiveness, IC manufacturers are increasingly interested in evaluating the EMC performance of their products as soon as during the very first design phase without the need of prototypes. There are a number of approaches to predict radiated emissions of automotive components as defined in the CISPR25 standard. However, it can be concluded that none of them are suitable for continuous use by the circuit designer itself because they either need a manufactured prototype and a lab engineer, or lots of simulation time and resources. The designer is normally no EMC expert and does not want to deal with additional, complex simulation tools. This paper presents the generation and use of a simulation model which can easily be implemented in the design environment (e.g. Cadence Virtuoso) used by the designer and does not notably increase the simulation time. The transient data is post-processed with a Matlab script emulating an EMI test receiver.