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physics.comp-ph2020★ 6 cited
Wigner-Smith Time Delay Matrix for Electromagnetics: Computational Aspects for Radiation and Scattering Analysis
Utkarsh R. Patel, Eric Michielssen
The WS time delay matrix relates a lossless and reciprocal system's scattering matrix to its frequency derivative, and enables the synthesis of modes that experience well-defined g…
physics.comp-ph2020★ 18 cited
Wigner-Smith Time Delay Matrix for Electromagnetics: Theory and Phenomenology
Utkarsh R. Patel, Eric Michielssen
Wigner-Smith (WS) time delay concepts have been used extensively in quantum mechanics to characterize delays experienced by particles interacting with a potential well. This paper…