Schnelle Simulationen von energieselektiven Oberflächen durch Modelle reduzierter Ordnung

Project Title
Fast Simulations of Energy Selective Surfaces via Reduced Order Models
Principal Investigator
Project Abstract
Since the 1970s, when the starting point was a single wire antenna loaded with a diode, the simulation of electrical/electromagnetic structures with nonlinear terminations is major topic of interest in the academia. Examples are active antennas, grid amplifiers, amplifier with shielding structures, on-chip interconnects with NL terminations, multistage amplifiers, and PCB decoupling problems. The general trend over the years shows dynamical systems of increasing size, massively loaded with NL components.

The aim of this project is improving the state-of-the-art in numerical simulation of large electrical/electromagnetic structures massively loaded with NL components/terminations. Examples are meta-surfaces for nonlinear shielding, or power delivery networks in Printed Circuit Boards (PCBs). The interplay between distributed (electrically large) nature and presence of NL terminations make the numerical simulation problem (to be cast in time-domain) extremely challenging. Our main effort will be dedicated to address two major limitations of state-of-the-art mixed circuit/field simulation methods, with specific reference to approaches based on model-order-reduction (macromodeling):

Improve and streamline generation of compact, passive and reliable macromodels for large-scale components, with hundreds of ports, obtained from tabular frequency responses
Systematic extraction and inclusion of reduced-order models also for the nonlinear terminations in a dedicated simulation environment, when the number of NL loads becomes very large

Since 2018, the groups of TUHH and POLITO have been working together at the project “Hybrid Simulation of Electromagnetic Field Interaction with Metallic Structures Showing Massive Nonlinear Loading”, supported by DFG. The ongoing collaboration is aimed to advance the state-of-the-art in the simulation of field interactions with nonlinear loaded structure, with a focus on meta-surfaces (metallic grids connected with diodes). The project involves a Ph.D. student from TUHH, M.Sc. T. Wendt, with special care to the interface between the home-made MoM solver provided by TUHH and the macromodeling generation part.