Communication systems are now characterized by a high degree of complexity, that expresses in 3 directions which are:

• Heterogeneity: heterogeneity of structure (multi-layered electronic, MEMs, optical), heterogeneous working environment (mobility) and heterogeneity of signal processing modes (mixed digital analog);

• Scales disparity in device geometry (nanoscale components, interconnects, packaging, antennas, ..) and signal time/frequency contents (baseband, sub-carriers, microwave carriers);

• High integration density (SIP and SOC).

This complexity makes modeling and simulation (or in other words, CAD methods and tools) a key element in the design of communications systems. It is necessary to model as precisely as possible the various blocs of the system and simulate its overall functioning effectively in order to get the good compromise between performance, costs and deadlines. This is especially important in high volume applications, where the industrial competition is particularly severe. This multidisciplinary program aims to bring together the skills developed over many years in different departments of the laboratory, around the simulation and modeling theme in order to address the modelling of complex systems, requiring skills at the crossroads of several areas (applied mathematics, physics, electromagnetic, thermal and circuit anlsysis).

The program is currently composed of 3 projects: Multi-domain simulation EM-Circuit, Substrate noise modeling and Model order reduction techniques.

Multi-domain simulation EM-Circuit

Responsable : François Torres

The project adresses EM-Circuit co-simulation methods with an emphasis on the simulation of agile antenna structures (multifunction, multibeam antennas, ..) and board EMC analysis with component visibility. 3 approaches are considered:

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• Direct coupling between Circuit and EM tools
• EM simulation techniques incorporating nonlinear macromodel blocs for active circuit blocs
• Circuit simulation techniques incorporating linear multipole macromodels from EM simulation

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Substrate noise modeling in RF SOCs

Responsable: Bruno Barelaud

This project adresses the simulation and design methodologies of RF SOC circuits. It focuses on modelling strategies that will best manage the multiple views of the electronic function (functional - architectural - technology - electrical - electromagnetic and thermal) within an high density, high frequency integrated circuit, and the integration of these models in existing or newly developed simulation tools.

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Model order reduction techniques

Responsable : Raphaël Sommet