Time-domain modelling and simulation of complex systems

The design of wide-band complex systems using a single field-based paradigm is time- and memory intensive. In particular, optimization requiring multiple analyses is prohibited unless all or part of the electromagnetic model can be substituted by a fast parameterized surrogate, such as an equivalent network, a discrete impulse response, a behavioral macromodel, a neural network, or a space-mapped coarse field model. Multi-level co-simulation involving one or more embedded surrogate subdomains can also yield significant speed-up. This presentation will describe typical examples of such surrogate model generation, substitution, embedding and co-simulation in the time domain, and demonstrate the dramatic acceleration obtained with these approaches.