FACET, a CAE system for RF analoque simulation is described. Layout-dependent effects such as parasitic electromagnetic coupling are included. The method of analysis provides accurate electrical modelling of multilayer PCB structures with a large number of arbitrarily-orientated tracks and printed components, without excessive demands on CPU and memory. This is achieved by building in knowledge of the frequencies of interest and the expected charge and current distributions. FACET is linked automatically to a layout CAD system and a circuit analysis package.